Monty Python is a British comedy troupe, famous for the television program Monty Python's Flying Circus and the films Monty Python and the Holy Grail, Monty Python's Life of Brian and Monty Python's The Meaning of Life.
For the anniversary TV special, Python Night: 30 Years of Monty Python, Trey Parker and Matt Stone made a short South Park homage to Monty Python with the "Dead Friend Sketch", a parody of Monty Python's "Dead Parrot Sketch". The cartoon also featured Terry Gilliam at the end.
Parker and Stone have cited Gilliam as an influence on the South Park animation style.
In the episode, "Go God Go XII", the three Atheist groups in the future (Allied Atheist Alliance, United Atheist Alliance, Unified Atheist League) are a reference to the Judean socialist resistance groups in Monty Python's Life of Brian (The Judean People's Front, the People's Front of Judea, and the Judean Popular People's Front).