Richard Haydn (10 March 1905 – 25 April 1985) was an English comic actor in radio, films and television. Some of his better known performances include Ball of Fire (1941) as Professor Oddley, No Time for Love (1943) as Roger, And Then There Were None (1945) as Thomas Rogers, The Emperor Waltz (1948), Alice in Wonderland (1951) as the Caterpillar, as Baron Popoff in The Merry Widow (1952), and The Sound of Music (1965) as Maximilian Detweiler.