Mika Boorem was 6 in Mickey's Fun Songs: Beach Party at Walt Disney World when she played the character 'Herself'.
That was over 29 years ago in 1995.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 36, and has starred in 25 movies in total, 23 of those since Mickey's Fun Songs: Beach Party at Walt Disney World was released.
In Mickey's Fun Songs: Beach Party at Walt Disney World, I think Mika Boorem looks: