Mickie McGowan was 64 in Finding Nemo when she played the character 'Additional Voices (voice)'.
That was over 21 years ago in 2003.
In 2022 she died aged 84, starring in 58 films in her career, 24 of those after Finding Nemo was first released. If she were alive today she would be 86.
In Finding Nemo, I think Mickie McGowan looks: