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Small town secrets turn deadly in trailer for slasher Happy Halloween

April 5, 2026 by Amie Cranswick

Uncork’d Entertainment has released a trailer, poster and images for writer-director Brittney Greer’s slasher Happy Halloween.

Emma Reinagel stars as Hadley, a teenager trying to rebuild her life after surviving a Halloween prank that went horribly wrong. But when a new wave of brutal killings broadcast over social media begin to terrorise her town, she’s forced to confront her past and work on uncovering the identity of the masked murderer.

The cast also includes Aline O’Neill, Cameron Mabie, Graham Weldin, and Jack Cathcart. Check out the trailer below…

The film follows Hadley (Emma Reinagel), a teenager returning home after surviving a traumatic Halloween prank gone horribly wrong. As she attempts to rebuild her life, a new wave of brutal killings rocks her community—each murder broadcast across social media in real time. With suspicion falling on nearly everyone around her, Hadley must confront her past and uncover the truth before the killer strikes again.

Happy Halloween arrives on digital platforms on April 14th.

 

Filed Under: Amie Cranswick, Movies, News, Trailers Tagged With: Aline O’Neill, Brittney Greer, Cameron Mabie, Emma Reinagel, Graham Weldin, Happy Halloween, Jack Cathcart

About Amie Cranswick

Amie Cranswick is Executive Editor of Flickering Myth, responsible for overseeing editorial coverage across film, television and pop culture.

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