Happy Death Day is a 2017 American black comedy slasher film directed by Christopher Landon, and written by Scott Lobdell. It stars Jessica Rothe, Israel Broussard, Ruby Modine, Rachel Matthews and Charles Aitken. The film was produced by Jason Blum through his Blumhouse Productions banner. The film is also in association with Digital Riot Media and Vesuvius Productions. It follows a college student who is murdered on her birthday and begins reliving the day repeatedly, at which point she sets out to find the killer and stop her death.
Originally announced in 2007 under the title Half to Death, the film was released on October 13, 2017, by Universal Pictures. It grossed $125 million worldwide on a $4.8 million budget and received mostly positive reviews, with critics deeming the film entertaining while acknowledging the familiar premise, and describing it as "Groundhog Day meets Scream". A sequel, Happy Death Day 2U, was released on February 13, 2019.