Andreas Avancini is a Brazilian voice actor known for his work in the Portuguese dubbing of animated series, films, and Japanese anime. He is part of a family with deep roots in the Brazilian entertainment industry, being the son of renowned television director Walter Avancini and the actress Andréa Avancini.

Avancini has built a significant career voicing characters in a wide range of animated productions. He is notably the Portuguese voice of the character Von Teppes in the anime series Radiant. His work in anime also includes roles such as Rill Boismortier in Black Clover, Haruka Nanase in Free! - Iwatobi Swim Club, Hyoma in the Beyblade: Metal series, Gibul Wisdan in Akashic Records of Bastard Magical Instructor, and Henzō Kure in Kengan Ashura. He has also contributed to other well-known anime titles like Death Note, Darling in the Franxx, and Saga of Tanya the Evil.

Beyond anime, Avancini is recognized for voicing prominent characters in Western animation. His roles include Miles "Tails" Prower in the Sonic the Hedgehog television series, Sheen Esteves in The Adventures of Jimmy Neutron: Boy Genius and its spin-off Planet Sheen, and Robin in the Portuguese dubs of The Lego Batman Movie and the Teenage Mutant Ninja Turtles series. He has also provided voices for live-action dubbing, such as for the character Light Turner in the 2017 film Death Note.