John Augustus Kelly Jr., known professionally as Jack Kelly, was an American film and television actor most noted for the role of Bart Maverick in the television series Maverick, which ran on ABC from 1957 to 1962.

Maverick is an American Western television series with comedic overtones created by Roy Huggins and originally starring James Garner as an adroitly articulate poker player plying his trade on riverboats and in saloons while traveling incessantly through the 19th-century American frontier. The show ran for five seasons from September 22, 1957, to July 8, 1962 on ABC.