That was over 13 years ago in 2008.
Today she is 31, and has starred in 48 movies in total, 28 since Twilight was released.
In Twilight, I think Kristen Stewart looks:
Twilight scores 5.8 out of 10 on The Movie Database.
Kristen Stewart's first acting role was as 'Girl in Fountain Line (uncredited)' in The Thirteenth Year, released in 1999 when she was 9.