Oliver Díaz is a Mexican voice actor and commercial announcer known for his work in the Latin American Spanish dubbing of anime, films, and television series. He was born in Mexico and is the son of audio engineer Rodrigo Díaz and actress Liliana Barba, placing him within a family dedicated to the entertainment industry. Díaz began his career as a child and has built an extensive filmography voicing young characters. In the field of anime, he is recognized for his role as Sho Kusakabe in the series Fire Force. He also voiced the character Uribō in the anime Waka Okami wa Shōgakusei!, which was released as the film Okko and the Ghosts. Additionally, he provided the voice for the iconic Digimon character Agumon in the film Digimon Adventure: Last Evolution Kizuna.

His work extends beyond these titles to include a wide range of anime roles, often portraying child or adolescent versions of characters. Some of these include Young Akira Fudo in Devilman Crybaby, Young Obito Uchiha and young Grisha Jaeger in the Naruto and Attack on Titan franchises, respectively, and Selim Bradley/Pride in Fullmetal Alchemist: Brotherhood. He has also lent his voice to characters in popular series such as Hunter × Hunter, JoJo's Bizarre Adventure, and One Piece. In addition to his anime work, Díaz has a substantial career dubbing characters in animated and live-action films and series. Notable roles include Dash Parr in Incredibles 2, Andy Davis in Toy Story 4, Charlie Brown in the Apple TV+ Peanuts projects, and Gecko in PJ Masks. His versatility as a performer is demonstrated by his frequent casting in roles that require voicing young, energetic protagonists across various genres of animation and live-action dubbing.