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 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, starring a man who lives with 100 Bill Cosby clones, and 2 Girls 1 Cup: The Show, an adaptation of the infamous Internet meme, where a cup unsuccessfully tries to have his two roommates take a shit in him.