Bradford Claude Dourif (; born March 18, 1950) is an American character actor. He was nominated for an Oscar, and won Golden Globe and BAFTA Awards for his supporting role as Billy Bibbit in the film One Flew Over the Cuckoo's Nest (1975). He is also known for his roles as Charles Lee Ray and the voice of Chucky in the Child's Play franchise (1988–2017), and Gríma Wormtongue in The Lord of the Rings series (2002–2003).
Dourif's other film roles include Wise Blood (1979), Dune (1984), Blue Velvet (1986), Mississippi Burning (1988), The Exorcist III (1990) and Alien Resurrection (1997). He also appeared in many television series, notably Deadwood (2004–2006, 2019), for which he received a Primetime Emmy Award nomination.
He is also known as Bradford Claude Dourif and Bradford Claude "Brad" Dourif.