David Barry Thwaites (born 16 June 1976) is a British actor and producer. He is most notable for his television appearances as a teenager.
In 1989, aged 13, he appeared as Eustace Scrubb in the BBC's adaptation of The Voyage of the Dawn Treader. A year later he reprised this role in The Silver Chair (1990). Now living in Los Angeles, he is a producer and served as executive producer on All the King's Men, License to Wed and Black Swan, and producer on Miss Potter.