Mary Sarah Healy was an American actress, singer, and variety entertainer.

The 5,000 Fingers of Dr. T. is a 1953 American musical fantasy film about a boy who dreams himself into a fantasy world ruled by a diabolical piano teacher enslaving children to practice piano forever. It was the only feature film written by Theodor Seuss Geisel, who wrote the story, screenplay, and lyrics. It was directed by Roy Rowland, with many uncredited takes directed by producer Stanley Kramer. The film stars Peter Lind Hayes, Mary Healy, Hans Conried, and Tommy Rettig.