That was over 12 years ago in 2009.
Today he is 42, and has starred in 18 movies in total, 10 since The Hangover was released.
In The Hangover, I think Justin Bartha looks:
The Hangover scores 7.2 out of 10 on The Movie Database.
Justin Bartha's first acting role was as 'Brian' in Gigli, released in 2003 when he was 25.