Yann Guillemot is a French actor primarily known for his extensive work in voice dubbing for animated series and films. He has lent his voice to numerous characters in the French-language versions of popular anime and Western animation productions. His career in dubbing includes a wide range of roles, from main characters to supporting and secondary parts, demonstrating his versatility across different genres and formats.

Guillemot's voice acting career is marked by several major roles in anime series that have been broadcast in France. He is notably recognized for voicing the character Yoshiki in the anime adaptation of the manga Tough, known in French as Shootfighter Tekken. Other prominent anime roles include the grandfather of Kagome and the demon swordsmith Totosai in the long-running series InuYasha, as well as its first film. He also provided the voice for Ian Vashti and Daryl Dodge in Mobile Suit Gundam 00 and voiced the father of the protagonist Kamina in Gurren Lagann. His filmography in anime includes characters in a wide variety of other series such as Kiichirō Kimiyoshi in When They Cry (Hinamizawa, le village maudit), Drake Anderson in R.O.D the TV, and multiple voices in The Garden of Sinners film series.

In addition to his anime work, Guillemot has an extensive portfolio dubbing characters in Western animation and live-action series. He voiced the Lord Protector in the animated film The Wolfwalkers. His work also includes voicing Pogo in the series The Umbrella Academy, Heiji Shindo in Blue Eye Samurai, and Happy Hogan in the French dub of Marvel's What If...?. He has also provided voices for films such as Megamind, where he voiced the title character's father, and The Wild Robot. Beyond animation, his dubbing work extends to characters in live-action films like Drunk (Druk) and Ainbo: Spirit of the Amazon.

While Guillemot's career is heavily focused on voice work, he has also appeared as an on-screen actor in several French live-action films. His credits include roles in the dramas Poursuite and Les Rues de Pantin. He has also worked as a composer, contributing to the film Prendre l'air.