Billy Crudup was 51 in Zack Snyder's Justice League when he played the character 'Henry Allen (uncredited)'.
That was over 2 years ago in 2021.
Today he is 54, and has starred in 46 movies in total, 0 of those since Zack Snyder's Justice League was released.
In Zack Snyder's Justice League, I think Billy Crudup looks: