Billy Crudup is an American actor known for his extensive work in film and theater, and he has a select but notable credit in the field of anime voice acting. His primary and most recognized contribution to the genre is providing the English dub voice for the protagonist Ashitaka in the acclaimed Studio Ghibli film Princess Mononoke.

Released in Japan in 1997, Princess Mononoke received an English-language dub produced by Miramax Films that premiered in 1999. In this version, Crudup voices Prince Ashitaka, the young warrior cursed by a demonic boar god who journeys west to find a cure. His performance places him among a cast of prominent American actors recruited for the English dub, including Claire Danes, Billy Bob Thornton, Minnie Driver, and Gillian Anderson. The role marked Crudup's first work in an animated feature and remains his singular, defining entry in the anime voice acting medium.

While Crudup has provided voice-over work for other projects, such as narrating American television commercials for MasterCard since 2005, his career has not included recurring collaborations with specific anime studios, directors, or voice directors in Japan or the United States. Beyond Princess Mononoke, he has no additional roles in anime films, television series, or original video animations. Consequently, there are no further major voice roles, recurring partnerships, or specific awards related to anime voice acting to document. His achievement in this field rests entirely on his performance in Princess Mononoke, which remains a landmark English dub of a classic anime film.