Robert Anthony Rist (born April 4, 1964) is an American actor. He is known for playing Cousin Oliver in The Brady Bunch, Martin in Grady and "Little John" in Big John, Little John. Rist is also known for voicing assorted characters in television shows, games and movies, most notably as the voice of Michelangelo in the films Teenage Mutant Ninja Turtles (1990), Teenage Mutant Ninja Turtles II: The Secret of the Ooze (1991), Teenage Mutant Ninja Turtles III (1993), and Casey Jones (2011); his ot
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