Mattia Nissolino is an Italian voice actor known for his work in animated films and television series, particularly in dubbing Japanese anime into Italian. He was born in Rome on January 13, 1997, and is the younger brother of fellow voice actor Alessio Nissolino; their father is a dubbing sound engineer who worked at Fono Roma, a historic dubbing studio. Nissolino began his voice acting career in the world of animated feature films, with one of his earliest roles being the voice of the seahorse Varenne in the Italian dub of the Pixar film Finding Nemo. He continued to work in animated cinema during his youth, providing voices for films such as Bambi 2, Ice Age: The Meltdown, and Surf's Up.

In the field of anime, Nissolino has taken on several notable roles. He provides the voice for the character Helmeppo in the Italian dub of the live-action Netflix series One Piece, dubbing the actor Aidan Scott who portrays the role. In the 2015 Japanese animated film The Case of Hana & Alice, a prequel to the live-action film Hana and Alice, Nissolino voices the character Kotaro Yuda, dubbing the original Japanese actor Ryo Katsuji. He is also known for voicing Gimmy Adai in the Italian dub of the mecha anime series Tengen Toppa Gurren Lagann, where Gimmy is an orphaned boy from the Adai village who, alongside his twin sister Darry, becomes a member of the Gurren Brigade and later a pilot of the Lagann Gunmen. Additionally, Nissolino voiced a young Suzaku Kururugi in the Italian version of the acclaimed series Code Geass: Lelouch of the Rebellion.

Beyond these roles, Nissolino has an extensive list of dubbing credits in animated television series. His Italian voice has been featured in shows such as Eureka Seven as Maurice, Chuggington as Wilson, Thomas & Friends as Percy, and Pororo the Little Penguin as the title character in the first Italian dub. He has also worked on more recent anime series, with roles including Haruo Kono in Kengan Ashura, Taiki Inomata in Blue Box, and Reiji Sugimoto in Solo Leveling.

Alongside his voice work in animation, Nissolino has dubbed numerous actors in live-action film and television. Notably, he is the recurring Italian voice of actor Tony Revolori, dubbing his role as Flash Thompson in the Spider-Man: Homecoming trilogy of films. He also voiced Riley Griffiths in Super 8, Zekeria Ebrahimi in The Kite Runner, and Sam Bell as George Harrison in Nowhere Boy, the latter of which he worked on alongside his brother Alessio. For his performance in The Kite Runner, Nissolino won the Premio Giovani Doppiatori, or Young Voice Actor Award, in 2008. He also had a small acting role as an on-screen performer in the Italian film Et in terra pax.