Debi Derryberry was 33 in Jimmy Neutron: Boy Genius when she played the character 'James 'Jimmy' Isaac Neutron (voice)'.
That was over 22 years ago in 2001.
Today she is 56, and has starred in 87 movies in total, 57 of those since Jimmy Neutron: Boy Genius was released.
In Jimmy Neutron: Boy Genius, I think Debi Derryberry looks: