In the comedy, Yorkshire entrepreneur Keith heads to London to make it big, encountering the likes of Kelly Brook, David Hasselhoff, Fearne Cotton, Holly Willoughby and Verne Troyer on his road to superstardom.
Digital Spy sat down with a topless Keith and fully-clothed Kelly for five madcap minutes to chat about meeting Billy Ocean, a potential title for the sequel and which scene they struggled to keep a straight face while filming.
Keith added: "I have a happy ending too quickly. We could only do it once because I'd have to go in a room and start again."
"We had to rein it in, because you knew it was going to be very entertaining watching him do that," Kelly said. "We were under strict orders from the crew. No laughing on the set."
Keith Lemon The Film opens in UK cinemas on August 24.
Photo gallery - Keith Lemon The Film premiere pictures: