Fictional character Tony Stark Marvel Cinematic Universe character Robert Downey Jr. as Tony Stark in Avengers: Infinity War (2018) First appearance Iron Man (2008) Last appearance Avengers: Endgame (2019) Based on Iron Man by Stan Lee Larry Lieber Don Heck Jack Kirby Adapted by Mark Fergus Hawk Ostby Art Marcum Matt Holloway Portrayed by Robert Downey Jr.