Marc Thompson is an American voice actor with a prolific career spanning several decades, known for his extensive work in anime dubbing, animated series, and video games. He is a graduate of New York University's Tisch School of the Arts, earning his Bachelor of Fine Arts in 1997. Thompson has been active in the voiceover industry since at least 1997 and has lent his talents to productions for prominent dubbing studios, including Konami Cross Media NY, NYAV Post, and DuArt Film and Video.

Thompson's filmography is vast, encompassing a wide array of characters in long-running and iconic anime franchises. He has been a significant presence in the various Yu-Gi-Oh! series, voicing characters such as Duke Devlin in the original series, taking over the role of Chazz Princeton in Yu-Gi-Oh! GX, and providing the voice of Astral in Yu-Gi-Oh! ZEXAL. His contributions to the franchise also include the role of Yosh Imimi in Yu-Gi-Oh! Sevens. In the Pokémon anime, Thompson has voiced numerous characters, both human and Pokémon, over many years. His Pokémon roles include Saturn, a high-ranking member of Team Galactic, and the voice of Ash's Gliscor and Pignite. He also voiced characters in several Pokémon films, including Mayor Oliver in Pokémon the Movie: The Power of Us. His work in the franchise extends to the English dub of the specials Pokémon: Mega Evolution Special I and Meloetta's Moonlight Serenade.

Beyond these major franchises, Thompson has taken on key roles in many other notable anime and animated projects. He voiced the character Tao En in both the 2001 and 2021 English adaptations of Shaman King, as well as the role of Lan in the Star Wars: Visions short film Tatooine Rhapsody. In the mecha genre, he played Degwin Sodo Zabi in Mobile Suit Gundam: The Origin: Advent of the Red Comet and multiple characters in GaoGaiGar: King of the Braves, including Geki Hyuuma, Kazuo Ushiyama, and VolFogg. He also voiced Masaaki Azumi in the film Children of the Sea and Masao Kume in Bungo and Alchemist -Gears of Judgement-. His earlier anime work includes the titular Kid Muscle in Ultimate Muscle and roles in Giant Robo and the 4Kids dub of One Piece as Don Krieg.

In addition to his voice acting in animation, Marc Thompson is widely recognized for his work as a narrator for numerous Star Wars audiobooks, including the Legacy of the Force and Fate of the Jedi series. He has also had prominent roles in western animation, such as voicing Casey Jones in the 2003 Teenage Mutant Ninja Turtles series and the title character in Robocar Poli. His career demonstrates a consistent and high-volume output across multiple facets of the voice acting industry.