Born in Portsmouth, Sellers made his stage debut at the Kings Theatre, Southsea, when he was two weeks old. He began accompanying his parents in a variety act that toured the provincial theatres. He first worked as a drummer and toured around England as a member of the Entertainments National Service Association (ENSA). He developed his mimicry and improvisational skills during a spell in Ralph Reader's wartime Gang Show entertainment troupe, which toured Britain and the Far East. After the war, Sellers made his radio debut in ShowTime, and eventually became a regular performer on various BBC radio shows. During the early 1950s, Sellers, along with Spike Milligan, Harry Secombe and Michael Bentine, took part in the successful radio series The Goon Show, which ended in 1960.