Jennifer Tilly was 23 in Imps* when she played the character 'Joni'.
That was over 41 years ago in 1983.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 65, and has starred in 100 movies in total, 100 of those since Imps* was released.
In Imps*, I think Jennifer Tilly looks: