Richard Haydn was a British-American comedy actor. Some of his better known performances include his roles as Professor Oddley in Ball of Fire (1941), Roger in No Time for Love (1943), Thomas Rogers in And Then There Were None (1945), Emperor Franz Joseph in The Emperor Waltz (1948), the Caterpillar in Alice in Wonderland (1951), Baron Popoff in The Merry Widow (1952), William Brown in Mutiny on the Bounty (1962), and Max Detweiler in The Sound of Music (1965).

Alice in Wonderland is a 1951 American animated musical fantasy comedy film produced by Walt Disney Productions and released by RKO Radio Pictures. It is based on Lewis Carroll's 1865 novel Alice's Adventures in Wonderland and its 1871 sequel Through the Looking-Glass. The production was supervised by Ben Sharpsteen, and was directed by Clyde Geronimi, Wilfred Jackson, and Hamilton Luske. With the voices of Kathryn Beaumont, Ed Wynn, Richard Haydn, Sterling Holloway, Jerry Colonna, Verna Felton, J. Pat O'Malley, Bill Thompson, and Heather Angel, the film follows a young girl Alice who falls down a rabbit hole to enter a nonsensical world Wonderland that is ruled by the Queen of Hearts, while encountering strange creatures, including the Mad Hatter and the Cheshire Cat.