Jason Morgan Ritter (born February 17, 1980) is an American actor and producer. He is son of the late actor John Ritter and actress Nancy Morgan. He is known for his roles as Kevin Girardi on the series Joan of Arcadia, Ethan Haas on The Class, Sean Walker on the NBC series The Event, Dipper Pines in Gravity Falls, and Pat Rollins in Raising Dion. He's also known for his recurring role as Mark Cyr on the NBC television series Parenthood, for which he received an Emmy Award nomination. In 2017, he starred in the ABC sitcom Kevin (Probably) Saves the World. He voiced the character Ryder in Frozen II.