What classic comedy film was funded by rock groups?

Having gained legions of fans through their television show, Monty Python’s Flying Circus, the troupe ventured into film. Traditional financiers were wary, but Pink Floyd, Led Zeppelin, Jethro Tull and other artists, along with their record companies, provided much of the funding for the low-budget film, Monty Python and the Holy Grail. (How low budget? Coconuts stood in for horses.) It is estimated that the film and ensuing play have earned around $175 million.