John Roberts is an American actor, comedian, and writer. He voiced Xyler on Gravity Falls.
Roberts is probably best known for his role as Linda in the FOX animated series Bob's Burgers. He has co-written an MTV pilot with Bob Odenkirk and performed two national tours for Margaret Cho as well as her Showtime special. He first gained notice on YouTube for his work as a writer and performer on "Jack & Debra."