Mark Justin Roiland (born on February 21, 1980) is an American actor, voice actor, writer, director, and producer. He is best known voicing the main character, Oscar on the Disney Channel's animated television show Fish Hooks and The Earl of Lemongrab on Cartoon Network's Adventure Time. He is also the co-creator and executive producer of Adult Swim's hit television series Rick and Morty, where he also voices the titular characters. He voices Blendin Blandin on Gravity Falls, as well as the incidental characters Bobby Renzobbi and the Royal employee.
- See: Justin Roiland
- In an episode of Rick and Morty, a show co-created by Roiland, when Stan's mug, notepad and pen were sucked into the portal in "Society of the Blind Eye," it teleported them to this episode.