Not the Messiah (He's a Very Naughty Boy) is a comedic oratorio based on Monty Python's Life of Brian. It was written by former Monty Python cast member Eric Idle and collaborator John Du Prez, and commissioned by the Luminato festival.

Eric Idle is an English actor, comedian, songwriter, musician, screenwriter and playwright. He was a member of the British comedy group Monty Python and the parody rock band the Rutles. Idle studied at Pembroke College, Cambridge, and joined Cambridge University Footlights. He reached stardom when he co-created and acted in the sketch series Monty Python's Flying Circus (1969–1974) and the films Monty Python and the Holy Grail (1975), Life of Brian (1979) and The Meaning of Life (1983) with John Cleese, Michael Palin, Terry Gilliam, Terry Jones, and Graham Chapman.