A bloody stage version of vampire movie Let The Right One In has sunk its teeth into London's theatre critics, who have described the drama as "frighteningly gripping" and a "love story with real bite". The Swedish horror movie, based on the novel of the same name by John Ajvide Lindqvist, became a 2010 U.S. film called Let Me In starring Chloe Grace Moretz and has now been translated for the stage by Britain's Royal Court Theatre company. The play opened at London's Royal Court Theatre on Thursday (05Dec13), and made a lasting impression on reviewers, who have praised director John Tiffany for encouraging more young people to make a trip to the theatre. The Daily Express' Elisa Roche writes, "The play has, in part, been brought in to attract younger theatre-goers to The Royal Court. But this is a production for all but the very young, or very faint of heart... (It) is bitingly, frighteningly gripping... this is also a love story with real bite - where one of the lovers just happens to be a centuries-old, androgynous vampire." Paul Taylor of The Independent applauds the play's "seriousness and emotional intensity" while adding that producers have created "a piece that will chill you to the marrow and break your heart". The London Evening Standard's Henry Hitchings calls the production "chilling" and packed with "nightmarish intensity", while Aleks Sierz of The Stage adds, "The play's sadness is compensated by John Tiffany's dazzling production, which is brilliantly theatrical and thrillingly staged... There is never a dull moment." Speaking at the opening night event, Tiffany defended the gory elements of the play, insisting the story of a lonely young boy who befriends a vampire is not a traditional horror story: "It's totally a love story. I do like horror films but I wouldn't ever be interested in putting a horror on stage - blood doesn't equal horror."