From SpongePedia, the First SpongeBob Wiki.
Mary Jo Catlett (born September 2, 1938 in Denver, Colorado) is an American actress.
Catlett is probably best known for her role as the housekeeper Pearl Gallagher on Diff'rent Strokes. She also appeared in General Hospital. She currently provides the voice for "Mrs. Puff" in the SpongeBob SquarePants TV series and The SpongeBob SquarePants Movie. She also appeared numerous times as "Mrs. Applebaum" in the popular show That's So Raven.