Frank Stephenson Dillane (born 21 April 1991) is a British actor. He is known for his roles as Nick Clark on Fear the Walking Dead (2015–2018) and 16-year-old Tom Riddle in the film Harry Potter and the Half-Blood Prince (2009). He also appeared as Henry Coffin in the film In the Heart of the Sea (2015). Dillane plays a recurring role in the 2022 gothic romance miniseries The Essex Serpent.