Austin Reed Dillon is an American professional stock car racing driver. He competes full-time in the NASCAR Cup Series, driving the No. 3 Chevrolet Camaro ZL1 for Richard Childress Racing. He is the grandson of RCR team owner Richard Childress, the older brother of Ty Dillon, who competes full-time in the NASCAR Cup Series, and the son of Mike Dillon, a former racing driver who currently works as RCR's general manager.