James Metcalfe Campbell Bower is an English actor, singer and model. He made his feature film debut in 2007 with a supporting role in Sweeney Todd: The Demon Barber of Fleet Street. He went on to feature in The Twilight Saga, The Mortal Instruments: City of Bones, and as the young Gellert Grindelwald in Harry Potter and the Deathly Hallows – Part 1 and Fantastic Beasts: The Crimes of Grindelwald. In 2022, Bower featured as Henry Creel / Vecna in the fourth season of the Netflix series Stranger Things, for which he received critical acclaim.