Univision broadcast 2 hour episodes of La Fea Más Bella from September 13, 2010, to April 15, 2011La Fea Más Bella. In 2009 it was dubbed into Arabic and aired on MTV Lebanon as Letty instead of La Fea Más Bella.
Letty is the protagonist of La Fea Más Bella (The Most Beautiful Ugly Girl), and as the title suggests, she is not particularly good-looking. The story begins with her going to an interview at Conceptos, a famous Mexican modeling and advertising company, and being turned down for the job because of her appearance. The president of the company, Fernando Mendiola, however, calls her back. After receiving the job from an uncertain president, Letty tries to prove herself with the help of The Club of the Uglies or The Ugly Club (El Cuartel de las Feas). She falls in love with the president, who's already engaged with Marcia Villarroel, and despite her better judgment soon becomes his lover. Eventually, Letty finds out that she was actually being used by Fernando to keep her on his side, and he never had any real feelings for her.
She finds a letter written by Vice-President Omar Carvajal which basically states that Fernando needed to seduce Letty in order to protect the fate of Conceptos. Angered and broken-hearted by this, Letty uses the contents to her advantage and presents the letter at a quarterly meeting and reveals the true financial state of affairs of the company to the company's council and former owners. They find out that she actually owns Conceptos herself through a dummy company, Filmo Imagen. She resigns from her job during the meeting and runs away to Acapulco with a friend named Carolina Ángeles. There, she meets a part-time fisherman and chef named Aldo Domenzaín, who saves her (literally) and helps her realize her true potential. When she returns to Conceptos as the full owner of it, she realizes she must correct the mistakes she made and tries her best to get the company back to its former glory so she can finally leave for good without a guilty conscience. She soon finds out that Aldo is in love with her but her lingering feelings for Fernando, despite the betrayal, keep her from moving on and trying for a relationship with Aldo.
As problems with the company begin again, she undergoes a dramatic appearance change, visits the wedding of a long-time enemy and a long-time friend, and acts on a television show dressed as a diva. Fernando has been suffering from his own transformation as he realizes the error of his womanizing ways and tries to convince Letty that he really did love her. He breaks up with Marcia, trades blows with Aldo, and works as Letty's assistant as a sort of penance and to show his father he's serious about his work. Letty's indecisiveness comes to an end as she realizes that though she loves both, she chooses Aldo. Letty prepares for her wedding with Aldo, and things seem to finally be winding to a close with Conceptos, financially (she puts Marcia in charge of the company because Marcia deserves the title for her hard work). However, when Fernando decides to go to Brazil, Letty realizes that the man she really loves, and wants to marry, is Fernando (and surprisingly enough, Aldo seems to be alright with that). The story ends with Fernando taking Aldo's place and the wedding and he and Letty marry, realizing that Aldo was an angel who helped them get back together.
Angélica Vale as Doña Leticia "Lety" Padilla Solis de Mendiola /Aurora Mayer De Salinas - She is an intelligent and charming but very ugly young woman. She seizes the chance to prove herself when she gets hired at Conceptos, one of Mexico's most prestigious media enterprises. She immediately falls in love with her boss, Fernando Mendiola despite the fact that he's already engaged to the jealously controlling Marcia. She is also hated by most of Conceptos staff who don't take her seriously and don't think she fits in. She helps her boss, (whom she calls "Don Fernando") fix his financial mistakes by tampering with the books after much hesitating and debating on the legalities of it. Her boss gets her on board by seducing her and pretending he wants to be her boyfriend. Despite him being engaged, and having not only witnessed but help cover for his many infidelities, she accepts and she helps him with the company financial troubles. After she finds out she was just being used, she runs away to Acapulco where she meets Aldo and learns to open up her heart again. She ends up in a love triangle between the handsome, kind Aldo and the man she still has lingering feelings for, Fernando. She gets two makeovers during the course of the show; the first one transforms her into a classical seductress-type beauty ("Aurora") which makes her realize her potential but leaves her feeling uncomfortable and unsure of who she really is. The second makeover is at the very end which combines the simplicty and demureness of her old self with the classic beauty of the vampy "Aurora". Over time, Lety realizes her worth and her influence on others, which helps win over most of the Conceptos staff. Her wedding was also a dramatic, elaborate affair, taking place in the Cathedral of Monterrey and containing everyone from Conceptos, which is much of the cast. (The broadcast of the wedding had the cast in a parade with thousands of fans crowding the streets to see Lety marry the man of her dreams.)
Jaime Camil as Don Fernando Mendiola Saénz- Son of Humberto Mendiola, he is elected as the new president of Conceptos when his fiancé, Marcia, votes for him. He's sarcastic and very much a playboy but he tries to do work hard at the company, despite his inexperience. He's initially unhappy at having an ugly assistant but finds her intelligence to be an asset and keeps her around, even coming to her defense on occasion. He convinces his assistant, Lety, to help him doctor some books by taking advantage of her feelings for him. He secretly "dates" her to keep her on his side, despite being engaged to Marcia. However, he slowly but surely falls in love with Lety but that's when she discovers he was just using her all along. She leaves and when she returns he finds it harder to convince her of his sincerity, especially when he discovers the new man in her life, Aldo. He jealously spies on Lety and Aldo when they start their burgeoning romance, enlisting his friend Omar to help. It takes him a while but he finally breaks up with Marcia, making it clear that he doesn't want her, and the only woman he really loves is Lety.
Elizabeth Álvarez as Doña Marcia Villarroel Duran - Fernando's fiancée. She knows her fiance's reputation as a Casanova so she keeps Fernando under surveillance, or employs her friend Alicia to do so, whenever she can. She initially doesn't like Lety because she thinks Lety is helping Fernando carry on his affairs (which is actually partly true). She never thought Lety and Fernando would be carrying on an affair and when she found out she was devastated, adding a new reason as to why she hated Lety until nearly the end. Lety tries to regard her with respect, knowing that she was in the wrong dating her boss despite knowing he was engaged to Marcia. She and Fernando break up and after realizing he'll never love her back, she decides they really are better off friends. Eventually Marcia meets someone online and they begin dating; she also gets over her negative feelings towards Lety and even attends her lavish wedding.
Patricia Navidad as Alicia Ferreira / de Mora - Alicia Ferreira is everything that Lety is not: graceless and tactless but sexy and proud of it. She gets hired at Conceptos, not for her abilities or her resume like Lety, but as Marcia Villarroel's spy on Fernando. She's "The Ugly Club's" nemesis, they nickname her "la oxigenada" ("Airhead"). She has serious monetary problems because she likes to buy herself lavish clothes and jewelry despite not having the salary for it. She often likes to brag that she studied "six semesters of finance at the Anahuac", as proof of her education and abilities. She ends up marrying Tomas, who she calls 'Tommy', after discovering how much money he makes at 'Conceptos'. Though she's shallow, vindictive, and spoiled, shades of her softer side start to appear towards the end of the series culminating in her returning the money she stole from 'Conceptos' after discovering Tomas was taking the blame for it.
José José as Don Erasmo Padilla - Lety's father. He's extremely strict and still sees his daughter as a little girl who cannot look after herself. He values good morals above all else and he's terrified of big changes. He treats Tomas like a son, and the only boy who's allowed in Lety's room. He later helps out with Lety's company, "Filmo Imagen". After much prodding from his wife and daughter, he accepts that Lety is a beautiful, grown woman who can take care of herself. He suffers a heart attack and almost dies. He and Julieta renew their vows.
Angélica María as Doña Julieta Solis de Padilla - Lety's mother. She is an excellent cook and a caring mother. Even when Lety does not want to tell her all that goes on in her life, she prays for her daughter's well-being and offers to lend an ear if she ever does want to talk. She treats Tomas like the son she's always wanted. feeding him whenever he stops by (which is often as he loves her cooking). She always supports her family and offers Lety and Tomas advice. Though she likes Aldo, she ends up being very supportive of Fernando and helps him win Lety back as she starts planning her wedding with Aldo.
Juan Soler as Aldo Domenzaín - A charming, handsome fisherman and chef with aspirations to own his own restaurant. He befriends Lety after saving her from drowning in the ocean He teaches her of the beauties of life and eventually falls in love with her much to the surprise of just about everyone, including Lety. He respects that she's still broken-hearted from her relationship with Fernando but he promises he'll win her heart, going so far as to follow her back to Conceptos and financially help the floundering company because he knows it's very important to Lety. Sometimes when Aldo has a heart to heart with Lety near water, a swan is seen swimming nearby. (a possible reference to the "ugly-duckling-to-swan"; the swan refers to Lety). He eventually gains ownership of Conceptos where he charms and befriends everyone there, except for Fernando. The two recognize each other as rivals for Lety's heart but try to not to fight too openly for the sake of Lety. Tomas changes his appearance to look more like Aldo and try and win over Alicia. Aldo offers sympathies and advice and the two discover they share a mutual dislike for Fernando (because he broke Lety's heart) thus becoming good friends. In the end of the series, he is revealed to be a guardian angel who was sent to help and save Lety.
Luis Manuel Ávila as Tomas Mora - He is Lety's best (and initially only) friend. Being as ugly as Lety is, they relate to each other well and have always been like siblings, giving each other moral support. He is very intelligent, loyal, and caring but lacks common sense at times. He falls for the buxom but shallow Alicia Ferreira after he finds a picture of her in a magazine. Though she displays hostility towards him due to his appearance, he continues to try to win her over with gifts and money, which she gladly accepts. When he discovers Alicia has a huge crush on Aldo, he tries to change his hairstyle and clothing to match him (though the plan backfires on him when he doesn't pull the look off). He becomes good friends with Aldo and encourages him to pursue Lety, especially since it'll discourage Alicia's crush on Aldo. He eventually ends up marrying Alicia and getting her pregnant at the end of the show. He is somewhat of a show-off and fancies himself as the general manager of Filmo Imagen, the "dummy" company he and Lety created to help out Conceptos financially. He also tries to transform himself from an ugly duckling to a "Prince Charming" but doesn't do it nearly as dramatically as his best friend. Food and women, in that order, are his Achilles' heel.
Nora Salinas as Carolina "Caro" Angeles de Carvajal - formerly Conceptos ' public promoter. She seems to appear when Lety is going through personal conflicts and helps her out. She then becomes Lety's 2nd best friend. She's also friends with Aldo and offers a friendly ear when he wonders how to go about winning Lety's heart. She helps makeover Lety into a seductress type model they nickname "Aurora". She's the only contact 'Conceptos' has with the mysterious Aurora and she tries to cover for Lety/Aurora when she can. She starts falling for Omar despite helping Lety get back at him for helping Fernando toy with her heart. She tries to convince Lety/Aurora not to toy with Omar anymore after hearing of his pain and heartache from the man himself. In the end, she ends up sleeping with, and then starting a relationship with Omar, who has more or less learned the error of his womanizing ways.
Agustín Arana as Don Omar Carvajal - He is Fernando's chauvinistic, womanizing best friend and accomplice. He is also Conceptos’ vice president. He believes firmly in bachelorhood and how to make the most of it. He usually supports Fernando's worst ideas and the advice he provides Fernando often turns out to be even worse than Fernando's own judgment. Omar believes that he is the ultimate Casanova and therefore he can woo any women he wants. In fact, he is the one who tells Fernando to seduce Lety in order to keep the company. He nicknames Lety "la gargolita" ("the little gargoyle"), which Fernando later comes to despise and angrily (with force) discourages. He meets his match in the mysterious woman, "Aurora" (secretly Lety) and falls head over heels for the stunning woman only to be rebuffed. He tries to woo the mysterious woman, confused but more determined every time she calls him on his playboy ways and leaves him planted. He seeks help from Carolina but eventually falls for her instead, thus ending his bachelor days.
Raúl Magaña as Don Ariel Vallarroel - Marcia's brother, Ariel is a greedy and selfish man only able to look after himself and his money. He wants to get the presidency of Conceptos no matter what. He's always sneaking behind Fernando's back, looking for flaws in his work. He gets the police on Tomas in the last episode, blaming him of a theft that was actually committed by Alicia, who then rushes to save him.
Sergio Mayer as Don Luigi Lombardi - Conceptos 's homosexual fashion director. He's obsessed with beauty and glamor and will not stand anything less. He declares himself Lety's enemy because of those beliefs. He develops a huge crush on Aldo and for a while he and Alicia try to fight for Aldo's attentions (which Aldo doesn't seem to realize). The crush more or less stops when he discovers, along with everyone at Conceptos, that Aldo is in love with Lety. He later on becomes obsessed with the glamourous and mysterious Aurora (secretly Lety) and would go on to do a second makeover on her right near the end of the show (a makeover that is in the middle of the ugly and seductress extremes; leaving Lety with a lovely look befitting her). He does this for her as a thanks for her helping him reunite him with his ailing mother and formerly unaccepting father.
Julio Mannino as Simon Jose (Simon Joseph) Contreras- He has a major crush on Paula María, although his job as the Conceptos messenger is not good enough for her standards. He is cute, sweet, fun, and always on the move. He eventually earns a diploma at Information Technology and wins over Paula Maria. They marry shortly afterwards. He and Celso keep close ties with the Ugly Club, but they aren't technically part of it because they are males, though sometimes others see them as part of the "Club" nevertheless.
Carlos Bracho as Don Humberto Mendiola - Founder and first president of Conceptos, he is Fernando's proud father. He appreciates honesty and loyalty. He almost sues Lety when he discovered what she did to his company (with Fernando), but he's confronted by her dad, and they end up forming a compromise.
Julissa as Doña Teresa "Teresita" Saénz de Mendiola- Fernando's mother likes to see her family together and is very fond of Marcia, siding with her against Lety, especially after the near bankruptcy of Conceptos (partly because of Lety and Fernando's book tampering) is discovered. Though she was distrustful of Lety at first, she ends up getting used to her.
Erick Guecha as Don Celso Duran - He is Conceptos 's doorman. He is very humble and honest. He is usually accompanied by his bulldog, Sansón. Though he is the first person to be disgusted at Lety's original appearance on her first to "Conceptos", he ends up being one of her first work friends, besides Simon and "The Ugly Club". He often does other people's, especially Alicia's, bidding.
Raquel Garza as Doña Sara Patino- Sara is Omar Carvajal's secretary. Her great height has impeded her from getting a good husband. Sara is very brave and will do anything to protect herself and the rest of "The Ugly Club". She ends up adopting a kid in the end.
Maribel Fernández "La Pelangocha" as Doña Martha Hurtado de Munoz - Secretary of Lic. Lopez. A sweet woman with a weakness for anything edible and for gossip. She is "The Ugly Club's" ears. She lives a relatively happy life with her husband and her daughter. She's always irritating Alicia Fereira by imitating her and wearing the same clothes she wore.
Luz María Aguilar as Doña Irma "Irmita" Ramirez- She is the oldest member of "The Ugly Club" and Luigi Lombardi's right hand. As the least gossipy of the group, she is always there to advise her friends or to give her boss his Valerian drops when the "mimisky" (mee-mees-kee) hits him. Her husband, who abandoned her years ago, makes an unexpected visit shortly after Irmita faints of being overworked in the middle of the program, and dies several episodes later for not taking his prescribed medication.
Rosita Pelayo as Doña Dolores "Lola" Guerrero de Rodriguez – Lola is "The Ugly Club" member who is always complaining about something: whether because her husband (whom she is planning to divorce) hasn’t paid her the owed child support or because her mischievous kids are up to something. Lola Marcia's secretary (and Olarte's before he is fired) and later on she gives herself a mini makeover by getting her hair styled differently and trying to enjoy life more.
Gloria Izaguirre as Juana Valdez – Juana is the maid/janitor. She is the only member of "The Ugly Club" who does not complain about her love life. She is very good at anything esoteric, such as reading crystal balls or tarot cards. She predicts Lety's distant wedding in one of the earliest episodes of the program.
Niurka Marcos as Doña Paula Maria Fuentes - Paula Maria is the receptionist and though she belongs to "The Ugly Club", she is quite pretty. However, because she wants the best for her and her son, Jaimito, she is very picky with the prospects she gets, always waiting for Prince Charming to come rescue her.
Carlos Bonavides as Don Efren Rodriguez "El Cheque" - Lola's irresponsible husband, whom she refers to as Señor Cheque (Mr. Check). He abandoned her and their children and he never has their monthly support payment on time. As he is not yet divorced from Lola, his relationship with his new sweetheart, Yazmín, can still be considered an affair.
Aleida Núñez as Yazmin Garcia - Yazmín is Efrén's lover and the cause of many of Lola's attacks of rage. Yazmín has a different face to show to each person. Yazmín dumps Efrén close to the end of the story. She is also known as Jayzmeen.
José Luis Cordero (Pocholo) as Don Paco "Gordolobo" Munoz - Martha's faithful husband. He is a taxi driver and, when Martha needs it, the kids' baby sitter. He and Marta are the only couple that never seem to run into arguments or disagree.
Adriana Ahumada as Adriana Rodriguez Guerrero - Daughter of Lola and Efrén. Adriana once almost starred in a bike commercial for Conceptos, but couldn't because Luigi found out that she couldn't ride a bike and that she was Lola's daughter. She is always looking after her younger brother, Cuco. She is really a good kid but is often sneaking around Conceptos with her brother and friends and getting into trouble.
Alex Correa as Cuco Rodriguez Guerrero - Son of Lola and Efrén. Cuco and his older sister live with their mother, because their father is very negligent towards them. He is a very cute, hyperactive, and mischievous little boy. He is a really good kid but often acts up and gets into trouble.
Miguel Jiménez as Jaimito Fuentes - Son of Paula María. He is a good kid whose always thinking of his mother. He also really likes Simon, considering him like a father, and having even once said he wanted to grow up to be a messenger just like Simon. Jaimito had the opportunity to meet and live with his real father but he really wanted to be with Simon and found out his mother did too. He happily ends up having Simon as his step-father when his mother marries Simon.
Fernanda Jiménez as Clarita Muñoz Hurtado - Daughter of Martha and Paco. Clarita is a good girl and is always seen playing with the other kids and having a good time. She ends up being the reason why her mother gets help with her eating problem, because she wants Clarita to have the childhood and mother she couldn't have (Martha's parents died when she was a little girl).