Let the Wrong One In is an 2021 Irish horror comedy film written and directed by Conor McMahon.

The film stars Karl Rice, Eoin Duffy, Hilda Fay, Lisa Haskins and Anthony Head.

[3] It was shot on location in various sites around Dublin, including the tourist attraction Bram Stoker's Castle Dracula (now closed).

[7] Let the Wrong One In won Best Visual Effects at the 2021 Screamfest Horror Film Festival.

[9] Conor McMahon was nominated for Best Director and Best Script at the 19th Irish Film & Television Awards.