Rinehart, Mary Roberts (1876–1958), playwright. The Pittsburgh‐born author best known for her mystery novels was also a successful dramatist. Her first play, written under the pen name Rinehart Roberts, was The Double Life (1906), but she had her first hit when she collaborated with Avery Hopwood on the comedy Seven Days (1909). After writing Cheer Up (1912) she rejoined with Hopwood in 1920 to write two huge successes, Spanish Love and The Bat. Rinehart's last play, an adaptation of another of her books, was the mystery The Breaking Point (1923). Autobiography: My Story, 1931.

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