James Corden apparently spent hours being fitted with false teeth to portray Paul Potts on screen.
The Gavin And Stacey star is playing the Britain's Got Talent winner in the film One Chance, and it seems movie boss Harvey Weinstein was so determined that they get his look exactly right - James had to try out six sets of teeth.
A source told The Sun: "James spent six hours in the dentist's chair at Ealing Studios with an army of people chipping in. The full make-up and wardrobe team had a say, with the director, producers and exec producers offering their thoughts.
"He filmed a full camera test ahead of filming kicking off next week. It's such a key part of the project to get right."
One Chance, which is written and directed by The Devil Wears Prada's David Frankel, follows the telephone salesman-turned-tenor's story as he overcomes the obstacles to get his singing career off the ground, before entering the first series of the ITV1 talent competition.