Harold Brent Wallis (born Aaron Blum Wolowicz; October 19, 1898 – October 5, 1986) was an American film producer. He is best remembered for producing Casablanca (1942), The Adventures of Robin Hood (1938), and True Grit (1969), along with many other major films for Warner Bros. featuring such film stars as Humphrey Bogart, Bette Davis, and Errol Flynn.

For his consistently high quality of motion picture production, he was twice honored with the Academy Awards' Irving G. Thalberg Memorial Award. He was also nominated for seven Golden Globe awards, twice winning awards for Best Picture. In 1975, he received the Golden Globe Cecil B. DeMille Award for lifetime achievement in motion pictures.