Marilyn Sue Schreffler (June 14, 1945–January 7, 1988) was an American voice actress who worked for Hanna-Barbera in the late 1970s and 1980s. Her credits include:
Voices:[]
- Brenda Chance on Captain Caveman and the Teen Angels
- Wendy on Yogi's Space Race and its supporting segment The Galloping Ghost
- Olive Oyl on The All-New Popeye Hour
- Brenda Chance and Daisy Mayhem on Laff-a-Lympics
- Betty Harkness and Miss Twilly on Fred and Barney Meet the Thing
- Olive Oyl, Lizzie and Puggy on Popeye and Son
- Snively in Yogi's First Christmas
- Cherie in Scooby Goes Hollywood
- Bernice in Yogi Bear and the Magical Flight of the Spruce Goose
- Rocky Ratrock and Flo Rubble on The Flintstone Kids
- Winnie Werewolf in Scooby-Doo and the Ghoul School