The character first appeared, unnamed, as a wartime love interest of Captain America in Tales of Suspense #75 (single panel) and #77 (May 1966), by writer Stan Lee and artist Jack Kirby. She appeared again as the older sister of Sharon Carter in Captain America #161 (May 1973). She was later retconned as Sharon's aunt due to the unaging nature of comic book characters (see Captain America Vol. 5 #25 (April 2007)). The character has appeared frequently in Captain America stories set during World War II.
An unnamed blonde British agent Agent Zero was rescued from Berlin by the Young Allies after her capture by the Red Skull and then joins up with Captain America in Young Allies #1 (Summer 1941).
Peggy Carter joins the French Resistance as a teenager, and becomes a skilled gun user who serves on several operations alongside Captain America. The two fall in love, but an exploding shell gives her amnesia, and she is sent to live with her parents in Virginia.[volume & issue needed]
With Captain America thought dead, she lives a quiet life for many years. After Captain America reemerges in the present-day, unaged after having been in suspended animation, Carter encounters the villain Doctor Faustus, from whom Captain America saves her.[volume & issue needed]
Peggy Carter first appears in the 2011 film Captain America: The First Avenger.Christy Lemire of the Associated Press said, "Atwell’s gorgeous looks make her a great fit for the part, but her character is better developed than you might imagine; she’s no damsel in distress, waiting for Captain America to save her, but rather a trained fighter who is very much his equal."Roger Ebert felt that she resembled "a classic military pin-up of the period" with her depicted "full red lips" of the film.
Atwell reprised her role as Carter in the Marvel One-Shot short film Agent Carter, which was packaged with the Iron Man 3 Blu-ray disc. The film takes place one year after the events of Captain America: The First Avenger, and features Carter as a member of the Strategic Scientific Reserve, searching for the mysterious Zodiac, and dealing with the sexism of the period.
Atwell reprises the role in the 2014 film Captain America: The Winter Soldier. Set in the present day, CGI was used to make Atwell appear as an elderly woman. Captain America visits her in the retirement home that she is currently living in.
Atwell appeared again in the 2015 film Avengers: Age of Ultron. She was seen in a 1940s flashback hallucination in Steve Rogers' mind which was caused by Scarlet Witch's powers.
Atwell reprises the role of Peggy Carter in the 2015 film Ant-Man. She was featured in a 1989 flashback which showed Hank Pym resigning from S.H.I.E.L.D. after discovering that the organization was trying to replicate the Pym Particle without his consent.
Atwell portrayed Peggy Carter for the second season of Agents of S.H.I.E.L.D. (which is part of the Marvel Cinematic Universe). She appears in the premiere episode "Shadows" where she and the SSR raid a Hydra facility and arrest Daniel Whitehall and the Hydra Agents with him. Peggy Carter later appeared in the episode "The Things We Bury" where a flashback shows her interrogating Whitehall.
Atwell stars in the series Agent Carter (which is part of the Marvel Cinematic Universe). In the series set in 1946 following the events in Captain America: The First Avenger, Carter must balance the routine office work she does for the Strategic Scientific Reserve while secretly assisting Howard Stark, who finds himself framed for supplying deadly weapons to the top bidder. Carter is assisted by Stark's butler Edwin Jarvis (who would later be the inspiration for Tony Stark's A.I. system J.A.R.V.I.S.) to find those responsible and dispose of the weapons which leads to the mysterious organization Leviathan.