Amanda Peet was 35 in The X Files: I Want to Believe when she played the character 'ASAC Dakota Whitney'.
That was over 16 years ago in 2008.
Today she is 52, and has starred in 48 movies in total, 12 of those since The X Files: I Want to Believe was released.
In The X Files: I Want to Believe, I think Amanda Peet looks: