Tom Grater International Film ReporterEXCLUSIVE: The Collection and Gavin & Stacey star Melanie Walters and Sanditon actress Kayleigh-Paige Rees have been cast in UK coming-of-age drama Faulty Roots, which will mark the debut of writer/director Ella Greenwood.Set in Somerset, England, the movie follows two teens with different genetic conditions who are forced to form a friendship.