The Once Upon a Time [1] cast shares an incredible bond [2], but one of the sweetest has to be between Jennifer Morrison and Colin O'Donoghue. Together they make up one of the show's most beloved couples [3], Captain Hook and Emma Swan, and we're just as obsessed with their offscreen friendship [4]. Whether they're posting behind-the-scenes snaps on social media or they're goofing off at Comic-Con [5], these two always have a good time together. See some of their best moments here.