Robert Downey Jr. was initially considered for a different role in Iron Man
He ultimately secured the role of Tony Stark/Iron Man
Director Jon Favreau revealed that Downey had been considered for other characters in previous projects
Downey's casting made the director's job easier as he understood the character
Downey's portrayal brought authenticity and attracted other actors to the project
Kevin Feige credited Downey as a key reason for Marvel Studios' success
Downey retired from the role after Avengers: Endgame
He has appeared in only one film, Dolittle, since leaving the Marvel Cinematic Universe
Downey produced and starred in a documentary about his relationship with his late father