is an American actor who is the grandson of actor and musician Tex Ritter
and the son of late actor John Ritter
. He is best known for his role as Kevin Girardi on the CBS
fantasy/family drama series Joan of Arcadia
and as Sean Walker on the NBC
serial drama series The Event
He voiced Dipper Pines on the Disney Channel animated series Gravity Falls (including voicing Dipper's clones in the episode "Double Dipper"). He will play Kevin Finn in the ABC TV show The Gospel of Kevin. He also played Martin Brockett in the 1999 Touchstone Pictures film Mumford.