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Happy Death Day, a 2017 American slasher film directed by Christopher Landon and written by Scott Lobdell. The film follows a college student named Tree Gelbman who is forced to relive the day of her murder over and over again until she can solve the mystery of her killer's identity. The film was both a commercial and critical success and has since spawned a sequel, Happy Death Day 2U. The film stars Jessica Rothe, Israel Broussard, Ruby Modine, Charles Aitken, and Rob Mello.