‘Semper Fi’ Premiere — Photos By: Medina Lynn 1 of 6 ‘Semper Fi’ Cast Chelsea Lauren/Shutterstock The cast and more celebrities at the ‘Semper Fi’ premiere in Los Angeles on Sept. 24. ‘Semper Fi’ will be released on Oct. 4. The movie follows Cal (Jai Courtney), a by-the-book police officer who, along with his close-knit group of childhood friends, makes ends meet as a Marine Corps reservist. When Cal’s reckless younger half-brother, Oyster, is arrested after a bar fight and given an unfair prison sentence, Cal – driven by his loyalty to family and fierce code of honor – fights for Oyster (Nat Wolff) in this gripping tale of brotherhood and sacrifice. The movie also stars Leighton Meester, Finn Wittrock, Beau Knapp, and Arturo Castro. ‘Semper Fi’ was written and directed by Henry-Alex Rubin. The movie will be available in theaters, On Demand, and Digital HD. See more photos of the ‘Semper Fi’ premiere in our gallery now. October 3, 2019, 5:50PM 2 of 6 Leighton Meester Chelsea Lauren/Shutterstock Leighton Meester dazzled in this printed dress at the red carpet. She plays Clara in the film. October 3, 2019, 5:49PM 3 of 6 Nat Wolff Chelsea Lauren/Shutterstock Nat Wolff at the film screening in Los Angeles. He plays Oyster in the movie. October 3, 2019, 5:49PM 4 of 6 Jai Courtney Chris Pizzello/Invision/AP/Shutt Jai Courtney at the special screening. He plays Cal in the movie. October 3, 2019, 5:50PM 5 of 6 Jai Courtney & Nat Wolff Chris Pizzello/Invision/AP/Shutt Jai Courtney & Nat Wolff have a moment at the film screening. They play brothers in the film. October 3, 2019, 5:50PM 6 of 6 Keanu Reeves & Karina Miller Chris Pizzello/Invision/AP/Shutt Keanu Reeves supports sister Karina Miller at the special screening. Karina is one of the producers of the movie. October 3, 2019, 5:51PM Click to Subscribe to Get Our Free HollywoodLife Daily Newsletter to get the hottest celeb news.