Jason Ritter is an American actor who is the grandson of actor and musician Tex Ritter and the son of late actor and comedian John Ritter. He is best known for his role as Kevin Girardi on the CBS fantasy/family drama series Joan of Arcadia from 2003 to 2005 and as Sean Walker on the NBC serial drama series The Event from 2010 to 2011.

For Disney, he voiced Dipper Pines on the Disney Channel animated series Gravity Falls (including voicing Dipper's clones in the episode "Double Dipper"). He plays Kevin Finn in the ABC TV show Kevin (Probably) Saves The World. He also played Martin Brockett in the 1999 Touchstone Pictures film Mumford.