Gunnar Sizemore Filmography
| 2024 | Everybody Still Hates Chris (TV Series) · as Greg (voice) |
| 2023 | Craig Before the Creek · as Jason / Kah / Boom (voice) |
| 2023 | Max & Me · as Raymond (voice) |
| 2023 | Goodbye Herman · as Herman (voice) |
| 2023 | Star Wars: Young Jedi Adventures (TV Series) · as Wes Vinik (voice) |
| 2022 | We Baby Bears (TV Series) · as Squatter Otter (voice) |
| 2020 | The Assignment · as Agent Bruce |
| 2020 | Gangsta Kids: The Snack Market · as Gangsta Kid #2 |
| 2019 | Latte & the Magic Waterstone · as Amaroo |
| 2019 | Cleopatra in Space (TV Series) · as Philo |
| 2019 | The Casagrandes (TV Series) · as Kingston |
| 2019 | The World We Make · as Logan Grove |
| 2019 | Ultraman (2019) (TV Series) · as Seiji Hokuto |
| 2019 | Lucky · as Hap Mcsweeney (voice) |
| 2019 | |
| 2018 | Kung Fu Panda: The Paws of Destiny (TV Series) · as Bao (voice) |
| 2018 | Intensive Care · as Gunnar |
| 2018 | The Adventures of Kid Danger (TV Series) · as Kids |
| 2017 | Craig of the Creek (TV Series) · as Jason (voice) |
| 2016 | Believe · as Collin |
| 2016 | Ben 10 (2016) (TV Series) · as Billy Billions |
| 2016 | Finding Dory · as Additional Voices (voice) |
| 2016 | Chelsea (TV Series) · as Kid |
| 2015 | Hotel Transylvania 2 · as Additional Voices (voice) |
| 2015 | Shimmer and Shine (TV Series) · as Ezri |
| 2015 | The Loud House (TV Series) · as Trent |
| 2014 | The Book of Life · as Ignacio (voice) |
| 2014 | Kahlil Gibran's The Prophet · as Bully Brat (voice) |
| 2013 | Clarence (2014) (TV Series) · as Commercial Kid 1 (voice) |
| 2012 | Nashville (2012) (TV Series) · as Micah Brenner |
| 2012 | Doc McStuffins (TV Series) · as Jacob |
| 2011 | Kickin' It (TV Series) · as Walt |
| 2010 | Conan (2010) (TV Series) · as Movie Kid Comedy Sketch |
| 2018 | Nickelodeon Kids' Choice Awards 2018 · as Self - Guest |
| 2023 | Willy Nilly · as Executive Producer |