Mae Questel / ˈmeɪ ˌkwɛˈstɛl / (born Mae Kwestel, September 13, 1908 – January 4, 1998) was an American actress. She was best known for providing the voices for the animated characters Betty Boop (from 1931), Olive Oyl (from 1933) and numerous others. Questel began her career in vaudeville, primarily working as an impressionist.