McMillon initially planned to be a journalist, but a high school field trip to Universal Studios introduced her to the craft of editing and inspired her to apply to film school. She attended Florida State University College of Motion Picture Arts, graduating in 2003.
In 2017, she was nominated for an Academy Award for Best Film Editing (shared with Nat Sanders) at the 89th Academy Awards. McMillon is the first black woman to be nominated for an Oscar for film editing. Barry Jenkins said of her nomination in 2017: “I respect her work. It makes me very proud of the work she did to see that I'm not the only one. Clearly all these folks in the academy respected the work she did as well.” McMillon also won (with Nat Sanders) Best Film Editing for her work on Moonlight at the 2017 Spirit Awards.
- Zola (2019)
- If Beale Street Could Talk (2018)
- Hum (Short) (2017)
- Lemon (2017)
- Moonlight (2016)
- Man Rots from the Head (Short, 2016)
- Girls (TV Series) (1 episode, 2016)
- Anne & Jake (TV Series) (7 episodes, 2015)
- SMILF (Short, 2015)
- Off-Season (Short, 2013)
- The Radio Gamers (Short, 2013)
- The Other Side of Silence (Documentary, 2012)
- Chlorophyl (Short, 2011)
- Shoot the Moon (Short, 2009)
- Shades of Gray (Short, 2009)
- Blue Boy (Short, 2009)
- Mr. Church (first assistant editor, 2016)
- Sausage Party (assistant editor: live action footage, 2016)
- Another Evil (additional editor, 2016)
- Togetherness (TV Series) (assistant editor - 5 episodes, 2015)
- Wyatt Cenac: Brooklyn (TV Movie) (assistant editor, 2014)
- Temptation: Confessions of a Marriage Counselor (first assistant editor, 2013)
- Madea's Witness Protection (assistant editor, 2012)
- Good Deeds (first assistant editor, 2012)
- Madea's Big Happy Family (first assistant editor, 2011)
- For Colored Girls (first assistant editor, 2010)
- Arcadia Lost (first assistant editor, 2010)
- Why Did I Get Married Too? (first assistant editor, 2010)
- I Can Do Bad All by Myself (first assistant editor, 2009)
- Not Easily Broken (first assistant editor, 2009)
- American Violet (first assistant editor, 2008)
- Columbus Day (first assistant editor, 2008)
- Judy's Got a Gun (TV Movie) (assistant editor, 2007)
- Taking 5 (first assistant editor, 2007)
- Talk to Me (apprentice editor, 2007)
- The Sarah Silverman Program. (TV Series) (assistant editor - 5 episodes, 2007) (first assistant editor - 1 episode, 2007)
- Beauty and the Geek (TV Series) (first assistant editor - 15 episodes, 2005-2006)
- Going Hollywood (TV Series) (first assistant editor - 2005)
- The Surreal Life (TV Series) (assistant editor - 12 episodes, 2004)
- The Biggest Loser (TV Series) (assistant editor - 5 episodes, 2004)
- Little Brown Boy (2003) (Short)
- My Josephine (2003) (Short)
- Straw Hat (2004) (Producer, Assistant Director)
- Sausage Party (2016) (special thanks)
- Medicine for Melancholy (2008) (special thanks)
|2016||Academy Awards||Best Film Editing||Joi McMillion
(shared with Nat Sanders)
|Alliance of Women Film Journalists||Best Editing||Nominated|
|American Cinema Editors Awards||Best Edited Feature Film - Dramatic||Nominated|
|Critics' Choice Awards||Best Editing||Nominated|
|Central Ohio Film Critics Association||Best Film Editing||2nd Placed|
|Chicago Film Critics Association Awards||Best Editing||Nominated|
|Independent Spirit Awards||Best Editing||Won|
|Indiewire Critics' Poll||Best Film Editing||Won|
|London Critics Circle Film Awards||Technical Achievement of the Year||Nominated|
|Online Film Critics Society Awards||Best Editing||Nominated|
|Phoenix Film Critics Society Awards||Best Film Editing||Nominated|
|San Francisco Film Critics Circle||Best Film Editing||Nominated|
|Satellite Awards||Best Editing||Nominated|
|Seattle Film Critics Awards||Best Film Editing||Nominated|
|St. Louis Film Critics Association||Best Editing||Nominated|
|Washington DC Area Film Critics Association Awards||Best Editing||Nominated|
- "The Lenny Interview: Joi McMillon". Lenny Letter. 2017-02-24. Retrieved 2017-03-12.
- "FSU alumni make history with 8 Oscar nominations for 'Moonlight' - Florida State University News". Florida State University News. 2017-01-24. Retrieved 2017-03-12.
- Giardina, Carolyn (January 24, 2017). "Oscars: 'Moonlight' Editing Nomination Marks a First". The Hollywood Reporter. Retrieved January 24, 2017.
- Aguirre, Abby. "Moonlight's Cinematographer on Filming the Most Exquisite Movie of the Year". Vogue. Retrieved January 7, 2017.
- Williams, Brennan (January 27, 2017). "Meet Joi McMillon, The First Black Female Oscar Nominee For Film Editing". The Huffington Post.
- Anderson, Tre'vell. "Meet 'Moonlight's' Joi McMillon, the first black woman editor to receive an Oscar nomination". latimes.com. Retrieved 2017-02-24.
- Sisavat, Monica. "Moonlight Editor Joi McMillon Just Made History at the Spirit Awards". POPSUGAR Celebrity. Retrieved 2017-02-27.