Wicked Little Letters is a 2023 British black comedy mystery film directed by Thea Sharrock, written by Jonny Sweet, and starring Olivia Colman, Jessie Buckley, Anjana Vasan, Joanna Scanlan, Gemma Jones, Malachi Kirby, Lolly Adefope, Eileen Atkins, and Timothy Spall. Based on a true scandal, it follows an investigation into the anonymous author of numerous crudely insulting letters sent to the residents of seaside town Littlehampton.

Wicked Little Letters premiered at the Toronto International Film Festival on 9 September 2023, and was released in the United Kingdom by StudioCanal on 23 February 2024. It received positive reviews from critics.