Under My Skin is a 1950 American sports drama film directed by Jean Negulesco and starring John Garfield and Micheline Presle.

It is based on the 1923 short story "My Old Man", by Ernest Hemingway, about a jockey being threatened by a mobster after winning a race he had agreed to throw.

The Hemingway story was later adapted for a 1979 CBS television film, My Old Man, starring Kristy McNichol, Warren Oates, and Eileen Brennan.

Dan double-crosses him, then avoids Bork's thugs, taking young son Joe with him to Paris.

British jockey George Gardner is able to find Dan gainful employment at the racetrack, while Joe persuades his dad that a new horse of theirs called Gilford would make a fine steeplechase racer.