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Life and career
Born as Arthur John Stainer, he was the younger son of Ferdinand (Frank) Steiner and Lilian Blumberg. His brother was the film actor Leslie Howard and his sister, the casting director Irene Howard. His uncle was the film director Wilfrid Noy. He married the actress Jean Compton Mackenzie (a daughter of the actor Frank Compton) in 1936 and they had a son together, the stage actor Alan Howard.
Arthur appeared in several television programmes such as Whack-O, a school comedy in which he played the hapless assistant headmaster Pettigrew to Jimmy Edwards' headmaster, and in cameo film appearances such as American Friends. He also appeared in the Wrath segment of The Magnificent Seven Deadly Sins, and in the small role of Cavendish in the James Bond film Moonraker.