Nicholas Galitzine went to boyband bootcamp to prepare for ‘The Idea of You’. The 29-year-old actor stars opposite Anne Hathaway in the new romcom as the singer in boyband August Moon, with his bandmates – Jaiden Anthony, Raymond Cham Jr., Vik White, and Dakota Adan – all professional dancers, and the quintet spent five weeks undergoing intensive training with choreographer Dani Vitale so the leading man could learn the swagger of a pop star while the others toned down their usual skills, as well as working together as a group. Nicholas told The Hollywood Reporter: “I just had to learn how not…