The episode stars Justin Roiland as Rick Sanchez and Morty Smith, Chris Parnell as Jerry Smith, Sarah Chalke as Beth Smith, and Spencer Grammer as Summer Smith. Also in the episode, Roiland voices series recurring characters Mr. Poopybutthole,[2] actor Keith David voices The President of the United States,[3] a major character in the episode, and Tara Strong portrays the Presidentress of the Mega Gargantuans, an alien species.