Gustavo Pereira is a Brazilian actor, voice actor, singer, and musician based in Rio de Janeiro. He has built a substantial career lending his voice to characters in a wide variety of animated series, films, and live-action projects for Brazilian Portuguese audiences.

Pereira is perhaps best known for his work in anime and animation. He is recognized for providing the Brazilian Portuguese voice of Arthur Pendragon across multiple installments of the popular anime The Seven Deadly Sins, including The Seven Deadly Sins, Revival of The Commandments, and Imperial Wrath of The Gods. He voiced the character from his early appearances until the final season, The Seven Deadly Sins: Judgement of the Dragon, after which the role was recast. His other notable anime roles include Semimaru Asai in the post-apocalyptic series 7SEEDS and the title character in Marcelino, Pan y Vino. His work in the genre also extends to roles in Digimon Adventure 02 as Cody, Beyblade as Ian Papov and Daichi, and the 2003 series Astro Boy as the titular character.

Beyond the world of anime, Pereira's voice is featured in a wide array of internationally renowned productions. He is the Portuguese voice for characters such as Nemo in Finding Nemo, Hiccup in How to Train Your Dragon, Blu in Rio, and Ferb in Phineas and Ferb. His film work also includes providing the voice for Ray Steam in Steamboy. In addition to animation, he has dubbed live-action roles, including Holt in the film Rings and characters in series such as The Wizards of Waverly Place and Club 57. His extensive voice work also encompasses characters in Voltron: Legendary Defender as Keith, and in the Brazilian animated series Wake Up, Carlo! as the character Carlo. His versatility is further demonstrated by a brief appearance in the 2008 film Xuxinha and Guto Against the Space Monsters, where he voiced the character Jonas.