That was over 23 years ago in 1998.
Today she is 51, and has starred in 73 movies in total, 46 since Lost in Space was released.
In Lost in Space, I think Heather Graham looks:
Lost in Space scores 5 out of 10 on The Movie Database.
Heather Graham's first acting role was as 'Dorrie Ryder' in Student Exchange, released in 1987 when she was 17.