Knock Knock new international poster is atrocious This new Knock Knock international poster is a bit weird. What are you doing, Keanu? By Poppy-Jay Palmer 27-07-15 4,439 Share on Facebook Share via Twiter Share on Google Plus Add to your Stumbleupon Likes Share via Email Image from Collider. Knock Knock has left cinemas in the UK, but will be released in the US on 9 October. You can read our Knock Knock review here. Get all the latest horror news with every issue of SciFiNow.