- "The Real Story of Christmas Tree" - 1992, 25 min, with his father, 'John Ritter'.
- Three's Company (1976) opening theme song Seasons 6-8 (1981-84), little boy next to Janet (Joyce DeWitt) in the zoo!
- (May 2002) : Plays "Tim" in "The Distance From Here", a play by Neil LaBute (Almeida At King's Cross, London, England, UK).
- (2005, October) Appeared in Wendy Wasserstein's play, "Third", at the Lincoln Center Theater's Mitzi E. Newhouse Theater, New York, N.Y.
- (2002) He acted in Neil Labute's play, "The Distance from Here," at the Almeida Theatre at King's Cross in London, England with Enrico Colantioni, Liesel Matthews, Ana Reeder, Amy Ryan and Mark Webber in the cast. David Leveaux was director.
- (2015) Music video: "Waiting on Love" by Nicki Bluhm & The Gramblers
- (June 15, 2012 to February 15, 2016) Voice of 12 year old Dipper Pines on Gravity Falls, an American animated television series produced by Disney Television Animation that first aired on Disney Channel (then later transitioned to Disney XD) from June 15, 2012 to February 15, 2016.