Tamlyn Tomita was 19 in The Karate Kid Part II when she played the character 'Kumiko'.
That was over 38 years ago in 1986.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 58, and has starred in 43 movies in total, 42 of those since The Karate Kid Part II was released.
In The Karate Kid Part II, I think Tamlyn Tomita looks: