That was over 12 years ago in 2009.
Today he is 56, and has starred in 100 movies in total, 30 since Sherlock Holmes was released.
In Sherlock Holmes, I think Robert Downey Jr. looks:
Sherlock Holmes scores 7 out of 10 on The Movie Database.
Robert Downey Jr.'s first acting role was as 'Puppy' in Pound, released in 1970 when he was 5.