Kenneth Mars was an American television, film, and voice actor, best known for Night Moves, Young Frankenstein, and Butch Cassidy and the Sundance Kid. Other film credits include Citizen Ruth, Shadows and Fog, Radio Days, Fletch, The Parallax View, The Producers, and What’s Up, Doc?

Film voice-over credits include Grandpa Longneck in The Land Before Time series, King Triton in The Little Mermaid, Professor Screweyes in We're Back! A Dinosaur's Story, and King Colbert in Thumbelina.

Theatre credits include his Broadway debut as Martin Eliot, Ph.D in The Affair (Henry Miller's Theatre), Dr. Ralph Brodie in The Best Laid Plans (Brooks Atkinson Theatre), and Cass Henderson in Any Wednesday (Music Box/ George Abbott Theatres); Off-Broadway, as Chester Billings in Best Foot Forward (Stage 73), Baron Stockmar in The Crown, The Ring (Lucille Lortel Theatre), and Sir Evelyn Oakleigh in Anything Goes (Orpheum Theatre).