BERLIN — British distributor Park Circus and Sony Pictures are to release a sing-a-long version of “Monty Python and the Holy Grail” in the U.K. to mark the movie’s 40th anniversary. The film will also be released internationally by Park Circus and in the U.S. by Rainbow Releasing.

The sing-a-long version of the 1975 comedy will be screened for the first time on Oct. 14 in more than 500 U.K. theaters for one-night only. The screening will be accompanied by a specially filmed introduction from Monty Python’s Terry Jones, Terry Gilliam, Michael Palin, Eric Idle and John Cleese. Park Circus is encouraging audiences to come along dressed up as their favorite character. There will be an interactive social media campaign in the lead up to the release.

Sony Pictures Home Entertainment will release “Monty Python And The Holy Grail: 40th Anniversary Edition” on Blu-ray in the fall.