Gunnar Sizemore
Description
Gunnar Sizemore is an American actor and voice actor known for his work in both live-action television and animated series. Born on January 9, 2005, he is the son of actor Kevin Sizemore and strength coach Gina Lombardi. He began his career at a young age, appearing in national commercials from the age of three and landing his first voice acting roles by age five. His early screen work included a recurring guest role on the Disney XD series Kickin' It. In 2014, he gained wider recognition for his live-action role as Micah Brenner on the ABC musical drama Nashville. Alongside his acting career, Sizemore has pursued academics, enrolling at Harvard College in 2023 where he studies world literature and film.
Sizemore's voice acting career features a range of prominent roles in animated series and films. He is recognized in the anime community for voicing Seiji Hokuto, also known as Ace, in the Netflix series Ultraman, a role he played across multiple episodes from 2019 to 2022. His other significant voice work includes the role of Bao in the DreamWorks Animation series Kung Fu Panda: The Paws of Destiny. He has also been a recurring presence in the world of Cartoon Network, voicing Jason in the Emmy and NAACP Image Award-nominated series Craig of the Creek, Billy Billions in the Ben 10 reboot, and Cooter in Clarence. His film voice work includes a supporting role in Hotel Transylvania 2 and providing additional voices for Finding Dory.
Throughout his career, Sizemore has collaborated with various studios and networks, including DreamWorks Animation, Netflix, Nickelodeon, and Cartoon Network. His work on Ultraman placed him alongside a cast that included Josh Hutcherson and experienced voice actors such as Steve Blum and Fred Tatasciore. In 2024, he was announced as the voice of Greg Wuliger in the Comedy Central animated series Everybody Still Hates Chris, a sequel to the live-action sitcom.
Among his notable achievements, Sizemore received a Best Actor nomination at the 11th Annual 168 Film Festival at the age of eight for his performance in the short film Heartfall. In addition to his acting, he is an award-winning writer and director; his short film Sterling, starring Malcolm Goodwin, won multiple awards on the festival circuit, including at the Academy Award-qualifying Indy Shorts International Film Festival. He has also directed theater productions, including Samuel Beckett's Krapp's Last Tape at the American Repertory Theater in Cambridge, Massachusetts.
Sizemore's voice acting career features a range of prominent roles in animated series and films. He is recognized in the anime community for voicing Seiji Hokuto, also known as Ace, in the Netflix series Ultraman, a role he played across multiple episodes from 2019 to 2022. His other significant voice work includes the role of Bao in the DreamWorks Animation series Kung Fu Panda: The Paws of Destiny. He has also been a recurring presence in the world of Cartoon Network, voicing Jason in the Emmy and NAACP Image Award-nominated series Craig of the Creek, Billy Billions in the Ben 10 reboot, and Cooter in Clarence. His film voice work includes a supporting role in Hotel Transylvania 2 and providing additional voices for Finding Dory.
Throughout his career, Sizemore has collaborated with various studios and networks, including DreamWorks Animation, Netflix, Nickelodeon, and Cartoon Network. His work on Ultraman placed him alongside a cast that included Josh Hutcherson and experienced voice actors such as Steve Blum and Fred Tatasciore. In 2024, he was announced as the voice of Greg Wuliger in the Comedy Central animated series Everybody Still Hates Chris, a sequel to the live-action sitcom.
Among his notable achievements, Sizemore received a Best Actor nomination at the 11th Annual 168 Film Festival at the age of eight for his performance in the short film Heartfall. In addition to his acting, he is an award-winning writer and director; his short film Sterling, starring Malcolm Goodwin, won multiple awards on the festival circuit, including at the Academy Award-qualifying Indy Shorts International Film Festival. He has also directed theater productions, including Samuel Beckett's Krapp's Last Tape at the American Repertory Theater in Cambridge, Massachusetts.
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