Leonard Lawrence is an overweight, dim-witted Marine cadet that appears in the 1987 war film Full Metal Jacket directed by Stanley Kubrick. Leonard is portrayed by Vincent D'Onofrio.

Amongst the new recruits on Parris Island is Leonard, whose slow-minded behaviour and fat figure earn him the nickname "Gomer Pyle", after the simple-minded mechanic character from The Andy Griffith Show, from the ruthless drill instructor Gunnery Sergeant Hartman. Throughout his Marine training, Pyle is repeatedly scolded and bullied by Hartman as the sergeant puts extra pressure on him to help him keep up with the rest of the platoon. The unmotivated, incompetent Pyle earns no sympathy from his fellow cadets, save for Private James T. "Joker" Davis, who offers a gentler hand when trying to motivate Pyle. Joker's efforts are in vain, it seems, as on top of his under-achieving in training, Pyle has also been hoarding forbidden foodstuffs such as doughnuts. When Hartman finds a doughnut in Pyle's foot locker, he instigates a collective punishment policy; instead of punishing Pyle, he punishes the rest of the platoon for Pyle's transgressions. This leads to the other cadets hazing Pyle by holding him down on his bunk and beating him with bars of soap wrapped in towels.

Following this incident, Pyle seems to go through an overnight personality change, becoming a model recruit. However, Joker is disturbed by the sudden attitude change in Pyle and fears for his mental well-being. His fears are confirmed when he discovers Pyle in the bathroom on the last night on the island, talking to his M14 rifle and loading it with live rounds. Pyle's expression during the scene makes it abundantly clear that he has snapped and he recites the Rifleman's Creed whilst Joker tries to calm him down. Hartman and the rest of the platoon are awoken by the noise and Hartman confronts Pyle in his usual unsympathetic and aggressive manner. Pyle puts an end to Hartman's abuse by shooting him with the rifle. Immediately after killing Hartman, Pyle kills himself by placing his mouth over the gun's barrel and pulling the trigger.

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