That was over 27 years ago in 1994.
Today she is 40, and has starred in 51 movies in total, 47 since Lassie was released.
In Lassie, I think Michelle Williams looks:
Lassie scores 6 out of 10 on The Movie Database.
Michelle Williams' first acting role was as 'April Porter' in Lassie, released in 1994 when she was 13.