Olive Oyl is a cartoon character created by E. C. Segar in 1919 for his comic strip Thimble Theatre. The strip was later renamed Popeye after the sailor character that became the most popular member of the cast; however, Olive Oyl was a main character for a decade before Popeye's 1929 appearance. In the films and later television cartoons, Olive Oyl is usually Popeye's girlfriend. The first two Popeye cartoons, Popeye the Sailor (1933) and I Yam What I Yam (1933), featured Bonnie Poe as the voice of Olive Oyl. She was thereafter voiced by character actress Mae Questel (who also voiced Betty Boop and other characters).

Source: Wikipedia