Camila Mendes is joining the cast of Amazon MGM Studios and Mattel Films' live-action take on 'Masters of the Universe.' The actress who rose to fame playing Veronica Lodge in the CW series 'Riverdale' has nabbed the key role of Teela in the movie. Mendes will star opposite Nicholas Galitzine, who is playing the role of He-Man in the adaptation of the popular toy brand first introduced in the 1980s.