Lewis McCartney is portrayed by Angus McLaren
Lewis is Cleo's childhood friend and is academically gifted. Upon finding out the girls' secret, he tries to find out what caused the transformations. He keeps the girls from doing anything unintentional during full moons and from sharing their secret. During Season 2, a new girl, Charlotte Watsford, steals him away from Cleo Sertori. He dumps her later in the season.