Moviegoers first saw the utilization of the special effect called “digital skin-grafting†to make a character look younger in a Marvel film back in Fox’s “X-Men: The Last Stand†(2006). This technique enabled them to present a flashback prologue with a younger and able-bodied Professor X (Patrick Stewart) and Magneto (Ian McKellen) set before the movie’s “near future†time period.
Marvel Studios would later go on to use similar cinematic CGI SFX techniques in several installments of the MCU series. Their primary go-to source for de-aging and related effects is this is the Lola VFX.
The following is a list of Marvel Cinematic Universe films and characters that had CGI work done on their appearance on-scene, whether to make them look younger, or older, or something else. It will only count human characters, so Groot and Rocket, for example, will not be included in this:
DE-AGED
- Ant-Man (2015)
- Hank Pym (Michael Douglas) – flashback set in 1989
- Captain America: Civil War (2016)
- Tony Stark (Robert Downey Jr.) – younger self in holographic projection (above)
- Guardians of the Galaxy Vol. 2 (2017)
- Ego (Kurt Russell) – flashback with Peter Quill’s mother in 1980s
- Ant-Man and the Wasp (2017)
- Hank Pym (Michael Douglas) – flashback set in 1987
- Janet Van Dyne (Michelle Pfeiffer) – flashback set in 1987
- Bill Foster (Laurence Fishburne) – flashback with young Ghost
- Captain Marvel (2019) – film is set in 1995
- Nick Fury (Samuel L. Jackson)
- Phil Coulson (Clark Gregg)
AGED
- Captain America: The Winter Soldier (2014)
- Peggy Carter (Hayley Atwell) – very advanced age in present-day setting
- Ant-Man (2015)
- Peggy Carter (Hayley Atwell) – aged to 70s in 1989 flashback
OTHER
- Captain America: The First Avenger (2011)
- Steve Rogers (Chris Evans) – skinny body type before super-serum