Desiderio Alberto Arnaz y de Acha III (March 2, 1917 – December 2, 1986) was a Cuban-born American actor, bandleader, and film and television producer. He played Ricky Ricardo on the American television sitcom I Love Lucy, in which he co-starred with his then-wife Lucille Ball. Arnaz and Ball are credited as the innovators of the syndicated rerun, which they pioneered with the I Love Lucy series.

Arnaz and Lucille Ball co-founded and ran the television production company called Desilu Productions, originally to market I Love Lucy to television networks. After I Love Lucy ended, Arnaz went on to produce several other television series, at first with Desilu Productions, and later independently, including The Ann Sothern Show and The Untouchables. He was also the bandleader of his Latin group, the Desi Arnaz Orchestra. He was known for playing conga drums and popularized the conga line in the United States.