Benoit Rivillon is a French actor who has provided voice work for several anime series dubbed into French. He is best known for his role as Caesar Clown in the long-running series One Piece. In this role, he voices the flamboyant and dangerous former scientist of the Marines' criminal investigation unit, a character noted for his distinctive laugh and gas-based powers.

Beyond One Piece, Rivillon has taken on other significant anime voice roles. He voiced Solf J. Kimblee in the 2003 version of Fullmetal Alchemist, a role that showcases his ability to portray calculating and menacing antagonists. His film work includes providing the French voice for the character Reese in the animated feature Batman: The Killing Joke, based on the DC Comics storyline.

Rivillon's professional background is rooted in classical theatre and vocal training. He studied at the Conservatoires d’art dramatique d'Amiens et de Lille from 1985 to 1989, followed by training at the Ecole Nationale Supérieure de la Comédie de St-Etienne from 1989 to 1991. He also pursued vocal studies at the Conservatoires de chant de Lyon et d'Aix-en-Provence from 1992 to 1996. This extensive training in both drama and singing has supported his career as a voice actor. In addition to his anime roles, his voice work includes narrating audiobooks, such as Le Loup des cordeliers by Henri Loevenbruck and Le Bug humain by Sebastien Bohler.