- The original name of the film was "", but it was later changed to ""because of the word "cancer" in the title . In the end, it was changed to 50/50, which means that Adam’s cancer cure hope is 50%. If translated literally, it should be called "Five Five Opens" or "Half Probability".
- The film was originally scheduled to star James McAvoy, but he withdrew from the crew due to personal reasons. Less than a week before the filming started, Seth Rogen called Joseph Gordon-Levitt and told him that there was a character waiting for him. Levitt was confirmed to appear in the film two days before the filming started.
- The film is adapted from screenwriter Will Rissel's own anti-cancer experience. Will Rissel is also the screenwriter and producer of this film, and he also played a small role in the film.
50/50 behind the scenes gags
2021-10-20 17:21
Extended Reading
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Mitch: Why haven't we met Rachel?
Alan: Yeah! What the fuck?
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Adam: See, but... that's bullshit. That's what everyone has been telling me since the beginning. "Oh, you're gonna be okay," and "Oh, everything's fine," and like, it's not... It makes it worse... that no one will just come out and say it. Like, "hey man, you're gonna die."