Clyde Beatty was a famed animal trainer, zoo owner, and circus mogul. He joined Howe's Great London Circus in 1921 as a cage boy and spent the next four decades rising to fame as one of the most famous circus performers and animal trainers in the world. Through his career, the circus impresario owned several circuses, including his own Clyde Beatty Circus from 1945 to 1956.