Answer
Yes, Terry Gilliam received acting roles in Monty Python. Gilliam is best known for his work as a director, but he also appeared in several episodes of Monty Python's Flying Circus. His most notable role was as Cardinal Fang in the "Spanish Inquisition" sketch. Gilliam also appeared in the "Dead Parrot" sketch, the "Ministry of Silly Walks" sketch, and the "Upper Class Twit of the Year" sketch.