Roiland was born on February 21, 1980. He grew up on an almond orchard in Manteca with his parents and a younger sister, Amy, a fashion designer. He is well known for being the voice of Oscar on Disney Channel's animated series Fish Hooks, Blendin Blandin on Disney XD's Gravity Falls, and the Earl of Lemongrab on Cartoon Network's popular animated series Adventure Time. He is also well known for his Channel 101 shorts he made in his early career, including such shows as House of Cosbys. He is also the co-creator of the Adult Swim series Rick and Morty, alongside Dan Harmon.