PopUS recently sat down with Zac Efron and his onscreen little brother, Charlie Tahan, as they promoted their new movie Charlie St. Cloud. Zac, who puts in an impressive dramatic performance in the film, revealed his secret to stirring up emotions on the set. He admitted he was relieved that he avoided going head to head at the box office with his girlfriend Vanessa — her Beastly was originally scheduled to hit US cinemas at the same time. Zac also talked about his hopes for future roles and learning how to sail — watch our interview below and stay tuned for more as we get excited for Charlie St. Cloud!