Mary Jo Catlett (b. 1938) is an actress of stage and screen. Her most notable roles include Pearl Gallagher on Diff'rent Strokes and the voice of Mrs. Puff on SpongeBob SquarePants. Other TV work includes guest appearances on Glee, Desperate Housewives, and M*A*S*H. She has also appeared on Broadway in Hello, Dolly! and The Pajama Game among others.