Emily Longeretta For the first time in her career, Sofia Carson got to be part of a film from the moment pre-production began until the very end — and then some. In fact, five years ago when director-producer Elizabeth Allen Rosenbaum met Carson on “Pretty Little Liars: Perfectionists,” the two clicked immediately. Rosenbaum asked one of her producer friends to keep an eye out for a script the two could do together.