Olivier Cuvellier is a Belgian actor, stage director, and artistic director, widely recognized for his extensive work in dubbing, particularly in animation and live-action film and television. He is also known by the occasionally used alternate spelling of his surname, Cuvelier. Cuvellier's career is rooted in a strong classical theatre background, having studied at the Institut des Arts de Diffusion from 1983 to 1987. Alongside his performance work, he has been active as a theatre director and has taught drama for over two decades.

While his dubbing career began in France during the 1980s, he is particularly prominent for his voice roles in major anime series. He is the regular French voice of the character Sanji in the long-running series One Piece, a role he has voiced in numerous films and specials dating back to the early 2000s. Another of his signature roles is that of Jiraya in the Naruto franchise, including its sequel series Naruto Shippuden and several associated films. His work in anime also extends to providing voices for characters in Yu-Gi-Oh!. In addition to animation, Cuvellier has been the French dubbing voice for numerous live-action actors, including Tim Robbins in films like The Shawshank Redemption and Arlington Road, and Dermot Mulroney in projects such as My Best Friend's Wedding.