Ronald Lee Ermey (1944-2018), better known as R. Lee Ermey, was an American actor and former United States Marine Corps drill instructor. His film career is inextricably linked to the iconic role of Gunnery Sergeant Hartman in Stanley Kubrick's *Full Metal Jacket* (1987), for which he earned a Golden Globe nomination. His portrayal, based in part on his real-life experience, became a benchmark for military characters.

Ermey specialized in roles as authoritative figures, often military or police, characterized by an imposing presence and a booming voice. Among his other notable roles are the sheriff in *Mississippi Burning* (1988) and the police captain in *Se7en* (1995). He also voiced the character of Slinky Dog in the *Toy Story* film series, demonstrating unexpected versatility. His acting style was marked by a raw realism and unparalleled intensity, making him an unmistakable face and voice of American cinema.