Tara Strong was 14 in The Wild Puffalumps when she played the character 'Holly (voice)'.
That was over 36 years ago in 1988.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 51, and has starred in 194 movies in total, 193 of those since The Wild Puffalumps was released.
In The Wild Puffalumps, I think Tara Strong looks: