It's a Wonderful Knife is a 2023 Christmas comedy-horror film that puts a spin on the classic It's a Wonderful Life. The story follows Winnie Carruthers, who saved her town from a psychotic killer but wishes she had never been born. She soon finds herself in an alternate universe where she doesn't exist, allowing the killer to roam free. The film stars Jane Widdop, Joel McHale, Katharine Isabelle, and Justin Long in lead roles.