Doc Hudson is an anthropomorphic 1951 Hudson Hornet who appears in the 2006 Pixar film Cars. In the film, Doc is the medical doctor and local judge for Radiator Springs. After meeting the rookie racecar Lightning McQueen, Doc reveals that he is actually a former Piston Cup racer known as the Fabulous Hudson Hornet, and returns to the Piston Cup to act as Lightning's crew chief in his races. It is implied that Doc died prior to the events of Cars 2, and he appears in flashback sequences in Cars 3.

The Hudson Hornet is a full-size car manufactured by Hudson Motor Car Company of Detroit, Michigan from 1951 until 1954, when Nash-Kelvinator and Hudson merged to form American Motors Corporation (AMC). Hudson automobiles continued to be marketed under the Hudson brand name through the 1957 model year.