Kenneth Mars, Actor: The Little Mermaid. Kenneth Mars was born on April 4, 1935 in Chicago, Illinois, USA. He was an actor, known for The Little Mermaid (1989), Butch Cassidy and the Sundance Kid (1969) and Young Frankenstein (1974). He was married to Barbara Newborn. He died on February 12, 2011 in Granada Hills, California, USA.