Jack the Dog is a 2001 American comedy-drama film, written and directed by Bobby Roth and starring Néstor Carbonell, Barbara Williams, Barry Newman, and Anthony LaPaglia.

Serial womanizer Jack (Néstor Carbonell) settles down with Faith (Barbara Williams), but when the marriage falls apart due to Jack's desire for women, he has to share custody of their son, Sam (Andrew J. Ferchland).

Living with Sam makes Jack slowly change his thinking and way of life.

[1] Jack the Dog received a mixed to negative response from film critics, and gained a lukewarm reception during its premiere at the Sundance Film Festival.

Todd McCarthy of Variety wrote: "Tale, which lurches along with little sense of pacing or time elapsed, has plenty of niggling problems," and added: "Performances, from the handsome Carbonell to those of Williams as the rhinoceros-hided wife and the many actresses in for literally quickies, are energetic but no more illuminating than the dialogue as to the inner life of their characters.