Though he’s known to everyone as a pop heartthrob, Troye Sivan actually fell into acting at first, almost by accident. And now he’s turned in one of the year’s notable performances in the gay conversion therapy drama “Boy Erased.” Here, Sivan recalls his acting journey, trying out his American accent on Uber drivers, and how he got his self-proclaimed title of Young Hugh Jackman, Sexiest Man Alive.