Julien Crampon is a French actor born in Paris on January 17, 1992, who has built a career spanning both on-screen performances and voice acting. He began his career as a young performer, appearing in French television series such as Le QG on Disney Channel. His early filmography includes roles in the television series Duval et Moretti and the film Bowling. Alongside his work in live-action, Crampon has become extensively involved in dubbing, providing the French voices for numerous characters in international films and animated projects.

In the realm of animation, Crampon has voiced several prominent roles. He is the French voice of Chuck in the Angry Birds film series. He also voiced Walter Beckett in Les Incognitos (Spies in Disguise) and Tony Rydinger in Les Indestructibles 2 (Incredibles 2). For Japanese anime dubbed into French, he voiced the character King in The Seven Deadly Sins the Movie: Prisoners of the Sky and provided the voice for Minato in Masaaki Yuasa's film Ride Your Wave. His work in French animation includes roles in Pil (released as疯狂大营救 in China), Le Tour du monde en quatre-vingts jours (Around the World in 80 Days), and Saules aveugles, femme endormie (The Blind Men & the Elephant).

Beyond animation, Crampon's dubbing career is extensive. He is a regular French voice for actors such as Justice Smith, notably in the Jurassic World films and Pokémon: Detective Pikachu, and for Fred Hechinger in projects like The Fear Street trilogy. He also dubs Charlie Heaton as Jonathan Byers in the series Stranger Things. Crampon continues to balance this voice work with stage and screen acting in France, including roles in the long-running television series Un si grand soleil and theatrical productions such as Les Marchands d'étoiles.