That was over 12 years ago in 2008.
Today he is 40, and has starred in 18 movies in total, 14 since 21 was released.
In 21, I think Aaron Yoo looks:
21 scores 6.5 out of 10 on The Movie Database.
Aaron Yoo's first acting role was as 'Ronnie' in Disturbia, released in 2007 when he was 27.
Find DVDs, posters and memorabilia about 21 on Amazon.