Zach Callison started taking singing lessons at age seven and made his debut that same year as Winthrop in a production of The Music Man. ∙ He made one of his first major TV appearances as a contestant on the game show Are You Smarter Than a 5th Grader?. ∙ For his first lead role in a TV show, he provided the voice of Steven, the main character in the animated series Steven Universe. ∙ In 2014, Callison won a Behind the Voice Actors Award for his work in the animated TV series Steven Universe. ∙ He sings on multiple songs on the Steven Universe, Vol. 1 original soundtrack, including the show’s theme, “We Are the Crystal Gems.” ∙ In 2018, he released the concept album A Picture Perfect Hollywood Heartbreak under his own name. ∙ In addition to providing voiceover work for the animated series Sofia the First and the film Lego DC Batman: Family Matters, he has guest-starred on the sitcom The Goldbergs.