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 several of the titular characters. He voiced Blendin Blandin on Gravity Falls, as well as the incidental characters Bobby Renzobbi and the Mattress King. He also voiced the King of the Gnomes in the original unaired pilot.
- 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 transported them to this episode.
- In the episode of "Big Trouble In Little Sanchez," a depiction of Bill Cipher appears on a computer monitor.