Mickie McGowan was 63 in Jimmy Neutron: Boy Genius when she played the character 'Additional Voices (voice)'.
That was over 22 years ago in 2001.
In 2022 she died aged 84, starring in 58 films in her career, 27 of those after Jimmy Neutron: Boy Genius was first released. If she were alive today she would be 86.
In Jimmy Neutron: Boy Genius, I think Mickie McGowan looks: