Known for department
Jason Morgan Ritter (born February 17, 1980) is an American actor and producer. He is known for his roles as Kevin Girardi in the television series Joan of Arcadia, Ethan Haas in The Class, Sean Walker in the NBC series The Event, Dipper Pines in Gravity Falls, and Pat Rollins in Raising Dion. He also played the recurring role of Mark Cyr in the NBC television series Parenthood, for which he received an Emmy Award nomination. In 2017, Ritter starred in the ABC comedy series Kevin (Probably) Saves the World. He voiced the character Ryder in Frozen II. Description above from the Wikipedia article Jason Ritter, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Dipper Pines (voice) (archive footage)
Frank Cleary Jr.
Little Acorn (voice)