Uploaded August 2026 | Updated September 2026, 3 weeks ago

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Hollywood stars are known for pushing through pain, but some went far beyond dedication by keeping serious illnesses secret while filming. From grueling physical transformations to hidden cancer battles and chronic conditions, these performances came with real-life struggles the cast and crew never saw coming. Which of these shocking behind-the-scenes health stories surprised you most? Let us know in the comments below! Our countdown includes Matt Damon in “Courage Under Fire,” Richard Pryor in “See No Evil, Hear No Evil,” Anton Yelchin in “Star Trek Beyond,” Tom Hanks in “Cast Away,” Chadwick Boseman across multiple films, and more!

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MsMojo is a leading producer of queen-sized lists and thought-provoking essays on Film, TV, Celebrity, Music, & more. Your trusted authority for ranking and analyzing Pop Culture.

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