Set during the Korean War, Devotion primarily follows a pair of U.S. Navy fighter pilots, and these main characters are portrayed in the movie's cast by two of Hollywood's most promising rising stars. Based on a true story and adapted from the nonfiction book Devotion: An Epic Story of Heroism, Friendship, and Sacrifice by Adam Makos, the movie is set in the early 1950s, when Americans aided South Korea in their conflict with North Korea. Devotion focuses on two real American pilots who served in the Korean War and became great friends and even greater aviators.

While centered on two main characters, played by Jonathan Majors and Glen Powell, Devotion also features a noteworthy supporting cast as well. As with any war movie — even those set mostly within the confines of small aircraft — the ensemble is key. Among the supporting players in Devotion is a pop singer less known for acting,...