The VFX techniques that were used to create a youthful Tony Stark are now being routinely used to give actors what amounts to digital face-lifts.
Robert Downey Jr. Once Improvised When Tom Holland Made a Mistake on Set
The 80s Movie That Inspired Robert Downey Jr.'s Flashback Scene In Captain America: Civil War Revealed
Essay 3.docx - Christian Ford Joe Young Writing 1 Captain America
Review: In 'Captain America: Civil War,' Super-Bro Against Super
Iron Man's Complete MCU Timeline Explained
How They De-Aged Robert Downey Jr. in CAPTAIN AMERICA: CIVIL WAR — GeekTyrant
How They Made Tony Stark Younger in 'Captain America: Civil War' - ZergNet
Avengers: Endgame' Details, Marvel References You Missed
Actual 20 year old RDJ vs De-aged 20 year old RDJ from Civil War
Captain America: Civil War
If Captain America knew Howard Stark before he was frozen for 70 years, how can Howard's son, Tony Stark, be so young? - Quora