Santino Fontana is an American actor and singer. He started his performing career on stage. In the 2010s, he started a career on television. His debut was in an episode of The Good Wife. He next guest-starred in Royal Pains. He went on voice the role of Prince Hans in the animated film Frozen, marking his cinematic debut. He next appeared as a minor character in Jack Ryan: Shadow Recruit. He also portrayed Wolfgang Amadeus Mozart in an episode of the show Mozart in the Jungle. He became further known for his role as Greg Serrano on Crazy Ex-Girlfriend. He starred on the show from 2015 to 2016. He next played David Saperstein in Shades of Blue.