That was over 20 years ago in 2001.
Today she is 27, and has starred in 46 movies in total, 42 since I Am Sam was released.
In I Am Sam, I think Dakota Fanning looks:
I Am Sam scores 7.3 out of 10 on The Movie Database.
Dakota Fanning's first acting role was as 'Clairee' in Father Xmas, released in 2001 when she was 7.