Actor R. Lee Ermey died April 15 from complications with pneumonia. He was 74.

Ermey was a real-life drill instructor and staff sergeant in the Marines, serving tours in Vietnam and Japan before heading to Hollywood. He was known for barking orders as military characters, although he did venture into other genres, and did a lot of fantastic voice-over work.

Ermey was best known for playing Gunnery Sgt. Hartman -- "The Gunny" -- in Stanley Kubrick's 1987 Vietnam War drama "Full Metal Jacket."

Ermey earned a Golden Globe nomination as Gunny, and earned a lifetime of respect (and fear) from viewers.

Ermey's "Full Metal Jacket" co-stars -- including Matthew Modine, Vincent D'Onofrio, and Adam Baldwin -- joined the many fans, critics, and friends who reacted on social media to Ermey's death.

Ermey also voiced Sarge in the "Toy Story" movies, and he'll be remembered and missed for that as well:

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