“Deadpool 2” star Julian Dennison is set to star in “One Winter,” a coming-of-age drama set in his native New Zealand during a period of racial unrest in the 1980s.Dennison will lead a cast that also includes Minnie Driver, James Rolleston and Erana James and that is directed by Paul Middleditch and Hamish Bennett. Blue Fox Entertainment is handling international sales and introducing the film in Cannes, which kicks off today.