That was over 13 years ago in 2009.
Today he is 49, and has starred in 71 movies in total, 21 since He's Just Not That Into You was released.
In He's Just Not That Into You, I think Ben Affleck looks:
He's Just Not That Into You scores 6.3 out of 10 on The Movie Database.
Ben Affleck's first acting role was as 'Tommy' in The Dark End of the Street, released in 1981 when he was 8.