Busby Berkeley (November 29, 1895 – March 14, 1976), born William Berkeley Enos in Los Angeles, California, was a highly influential Hollywood movie director and musical choreographer.

Berkeley was famous for his elaborate musical production numbers that often involved complex geometric patterns. Berkeley's works used large numbers of showgirls and props as fantasy elements in kaleidoscopic on-screen performances.

Berkeley made his stage debut at five, acting in the company of his performing family. During World War I, Berkeley served as a field artillery lieutenant. Watching soldiers drill may have inspired his later complex choreography. During the 1920s, Berkeley was a dance director for nearly two dozen Broadway musicals, including such hits as A Connecticut Yankee. As a choreographer, Berkeley was less concerned with the terpsichorean skill of his chorus girls as he was with their ability to form themselves into attractive geometric patterns. His musical numbers were among the largest and best-regimented on Broadway.