Coming from a theatrical family, Jack Douglas' entry into show business was as a producer, however, not as a performer. His father was a theatrical producer, and Jack followed in his footsteps at an early age--he produced his first show at 15. Douglas showed no interest in the performing end of the business until one night when one of his actors took ill and, there being no replacement, Douglas put on the character's costume and did it himself. He enjoyed it so much that he soon gave up producing comedies and began performing in them. It wasn't long before he became one of the more recognizable character actors in British films, especially in the "Carry On" series, where he played a variation on his most famous character, a nervous, terrified and perpetually fidgety little man.