John Cleese is the voice actor of Quincy Endicott and Adelaide in Over The Garden Wall.
John Marwood Cleese (born October 27, 1939) is an English actor, comedian, writer, and film producer. He achieved success at the Edinburgh Festival Fringe and as a scriptwriter and performer on The Frost Report. In the late 1960s, he co-founded Monty Python, the comedy troupe responsible for the sketch show Monty Python's Flying Circus and the four Monty Python films: And Now for Something Completely Different, Monty Python and the Holy Grail, Life of Brian and The Meaning of Life.