Callum Robilliard Turner (born 15 February 1990) is an English actor. After beginning a career as a fashion model, he began working in film and television. He had lead roles in the drama film Queen and Country (2014) and the mystery miniseries Glue (2014). He played Theseus, the brother of Newt Scamander, in the fantasy films Fantastic Beasts: The Crimes of Grindelwald (2018) and Fantastic Beasts: The Secrets of Dumbledore (2022).

Turner's performance in the mystery series The Capture (2019) earned him a nomination for the British Academy Television Award for Best Actor. He has since starred as Joe Rantz in the biographical film The Boys in the Boat (2023) and as John "Bucky" Egan in the miniseries Masters of the Air (2024).