Hal B. Wallis (September 14, 1899 - October 5, 1986) was an Academy Award-winning American motion picture producer.

Born as Harold Brent Wallis in Chicago, his family moved in 1922 to Los Angeles, California, where he found work as part of the publicity department at Warner Bros. in 1923.

Within a few years, Wallis became involved in the production end of the business and would eventually become head of production at Warners. In a career that spanned more than fifty years, he was involved with the production of more than 400 feature-length movies.

Among the many great movies he produced was Casablanca, one of the most honored movies in Hollywood history, as well as True Grit, for which John Wayne won the Academy Award for Best Actor of 1969. Wallis left Warner Bros. in 1944 to work as an independent producer, enjoying considerable success both commercially and critically. Among his financial hits were the Dean Martin and Jerry Lewis comedies, and several of Elvis Presley's movies.

Hal Wallis received sixteen Academy Award nominations for Best Picture, winning for Casablanca in 1943. For his consistently high quality of motion picture production, he was twice honored with The Irving G. Thalberg Memorial Award. He was also nominated for seven Golden Globe awards, twice winning awards for Best Picture. In 1974, he received the Golden Globe Cecil B. DeMille Award for lifetime achievement in motion pictures.

Legendary producer Hal B. Wallis was born in Chicago and moved to Los Angeles when he was in his early 20s. He got a job managing a theater owned by Warner Bros., and his success at the job caught the eye of studio head Jack L. Warner, who gave him a job in the studio's publicity department. Within a few months Wallis had worked his way up to head of the department. He was named studio manager in 1928 and production manager shortly thereafter, but was pushed aside by another legendary producer, future 20th Century-Fox studio head Darryl F. Zanuck. In 1933 Zanuck left Warner and Wallis moved back to his old position. He oversaw the production of many of Warners' most famous films, including Little Caesar (1931), I Am a Fugitive from a Chain Gang (1932), Captain Blood (1935), Adventures of Robin Hood, The (1938) and Casablanca (1942). In 1944 Wallis left Warner and formed his own production company, and achieved even more success, being responsible for such films as Rose Tattoo, The (1955), Becket (1964), and a string of Elvis Presley movies, most of which were economically produced and all of which made a fortune. Wallis' last picture was the John Wayne (I) western Rooster Cogburn (1975).