Patricia Arquette was 17 in A Nightmare on Elm Street 3: Dream Warriors when she played the character 'Kristen Parker'.
That was over 37 years ago in 1987.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 56, and has starred in 59 movies in total, 57 of those since A Nightmare on Elm Street 3: Dream Warriors was released.
In A Nightmare on Elm Street 3: Dream Warriors, I think Patricia Arquette looks: