Olivier Martret is a French actor born on July 18, 1989 in Les Lilas, France, who is primarily active in the field of dubbing. Trained at the Théâtre de l'Est parisien, he began his dubbing career in 2001. In the context of anime, Martret is known for providing French voices for several prominent characters in animated series and films.

Among his notable anime roles, Martret performs the voice of Simon in the series Gurren Lagann, the role of Michael Trinity in the series Mobile Suit Gundam 00, and the role of Naoki Miki in the series Sword Gai: The Animation. His work also includes the character Mako in The Legend of Korra and Zick in Monster Allergy. In the realm of animated films, he is the French voice of Pazu in Hayao Miyazaki's Laputa: Castle in the Sky and Tombo in Kiki's Delivery Service.

Beyond his work in animation, Martret has an extensive career dubbing live-action productions. He is particularly recognized as the consistent French voice of actor Rupert Grint, most famously providing the voice for Ron Weasley in all eight films of the Harry Potter saga. He is also known as the French voice of Charlie McDermott as Axl Heck in the television series The Middle. His other dubbing credits include roles in series such as Teen Wolf, Pretty Little Liars, and Gotham, as well as films like Peter Pan and The Chronicles of Narnia: The Voyage of the Dawn Treader.