The three surviving members of Led Zeppelin refused to rule out a further reunion today (September 21) as they launched a new live film.

In a rare appearance together, Robert Plant, Jimmy Page and John Paul Jones assembled in a London cinema to preview Celebration Day, a film of their one-off 2007 reunion gig.

The band teamed up with drummer Jason Bonham - son of late original member John Bonham - for a massive gig at London's O2 Arena nearly five years ago to commemorate the life of Atlantic Records founder Ahmet Ertegun, who had passed away.

In a media Q&A with the band today, Led Zeppelin dodged questions about a further reunion, with guitarist Jimmy Page retorting:

"Can I just ask you all if you enjoyed the film?"

When further pressed for an answer on the idea of another reunion, singer Robert Plant quipped: "That would be kiss and tell."

Their show in 2007 was their first together in 27 years, with 20 million fans applying for tickets - but only 19,000 were selected for tickets.

Celebration Day will hit cinemas in the UK on October 17, with a DVD release on November 19.