Zac Efron will always be known for breaking into song as teen heartthrob Troy Bolton in the High School Musical movies, Link Larkin in Hairspray, or alongside Hugh Jackman and Zendaya in The Greatest Showman, among his other acting projects. Getting the catchy showtunes of his past out of his head was nothing compared to playing his darkest role yet, serial killer Ted Bundy.
Article source: https://www.cinemablend.com/news/2470935/zac-efron-had-trouble-separating-himself-from-ted-bundy-in-extremely-wicked-shockingly-evil-and-vile