Robert Downey Jr. was 53 in Avengers: Endgame when he played the character 'Tony Stark / Iron Man'.
That was over 5 years ago in 2019.
Today he is 59, and has starred in 119 movies in total, 7 of those since Avengers: Endgame was released.
In Avengers: Endgame, I think Robert Downey Jr. looks: