Monthy Python have revealed their comeback will be on July 1st, 2014 at the O2 Arena in London.
The comeback, directed by Phil McIntyre, will be the legendary comedy troupe's first new show in three decades.
Tickets go on sale at 10am on November 25.
Eric Idle, Michael Palin, John Cleese, Terry Gilliam and Terry Jones chose actor Warwick Davis to host the news conference and joked that the show would be held in Qatar.
Idle said the show would centre on the team's "greatest hits" and would also pay tribute to Graham Chapman, the sixth Python member, who died in 1989.
He also said they had received "bids" to host the performance in locations around the world.
A statement ahead of their appearance said it would be their "final reunion".
The new show will be their first time on stage together since performing at the Hollywood Bowl on September 15, 1980 and 40 years after they last appeared on stage in the UK.
The group's Monty Python's Flying Circus TV show was made between 1969 and 1974 and is widely acknowledged as having revolutionised British comedy.
They have since amassed millions of fans for their anarchic comedy series and films, which also launched their own successful solo careers.
Here's John Cleese & Michael Palin on accusations that they're just milking their old material: