Robert Downey Jr. was 39 in Good Night, and Good Luck. when he played the character 'Joe Wershba'.
That was over 19 years ago in 2005.
Today he is 59, and has starred in 119 movies in total, 57 of those since Good Night, and Good Luck. was released.
In Good Night, and Good Luck., I think Robert Downey Jr. looks: