Simon Duprez is a French actor who works primarily in voice dubbing, practicing his profession in Belgium. He is known for providing the French voices for characters in a variety of animated series and films. His voice work in anime includes the role of Nathaniel Hawthorne in Bungo Stray Dogs. He is also the voice of Sonrisas and Grimaldo in the animated film Unicorn Wars. Other notable credits in animation include Bowson in Dragon Quest: The Adventure of Dai, Inspector Queen in Lupin the Third Part 6, and Noël in Devilman Crybaby.

Duprez has contributed his voice to the long-running Pokémon franchise. He has been part of the dubbing cast for the series since the seventh cycle, Pokémon Journeys: The Series, where he voices minor characters such as the director Kublock. He also lends his voice to a character in the web series Pokémon Evolutions. Beyond anime and animation, his dubbing work extends to live-action television, where he is known for voicing Marcus in the series Superstore. In addition to character dubbing, his work also encompasses voice-over for documentaries, such as providing the French voice for Jehan De Chelles in Notre-Dame de Paris, l'épreuve des siècles.