Popeye is a fictional sailor created by cartoonist E. C. Segar. He first appeared in the Thimble Theatre comic strip in 1929. He is known as a tough, determined and good-hearted underdog who does not give up when he faces a challenge. Spinach is closely associated with his strength. Olive Oyl, Swee'Pea and Wimpy are among his friends, while Bluto is his best-known rival. Popeye's stories usually emphasize courage, persistence and helping others.