Billy and Bobby Mauch

They began singing and acting in radio at the age of seven[2] and later appeared in print advertisements before signing a contract with Warner Bros. After moving with their mother to Hollywood in 1935, Billy was cast as the young title character in the film Anthony Adverse because he resembled Fredric March,[1][2] who was to play Adverse as an adult.

[3] They were cast as lookalikes in The Prince and the Pauper (1937), in which they co-starred with Errol Flynn and Claude Rains, and were each paid $350 per week.

[4] The twins went on to appear together in three films based on the Penrod stories by Booth Tarkington, but Bobby ended his acting career shortly afterwards.

"[1] In 1943 the brothers appeared in the Broadway play Winged Victory, then saw actual military service together in World War II, stationed in the Pacific.

[1][2] After the war, Billy continued to play minor roles in films, the last of which was the comedy Bedtime for Bonzo (1951), which famously starred Ronald Reagan and a chimpanzee.