Hollywood actor Tom Hardy has launched the Royal Marines' attempt to break the world record for the longest group drum roll.
American star Harrison Ford was also present as the Royal Marines Corps of Drums began the record attempt at the Tower of London as part of a year of celebrations marking the 350th anniversary of the Royal Marines, the Ministry of Defence said.
With the current record standing at 28 hours, 19 minutes and three seconds, the Corps of Drums hope to extend it to 64 hours by drumming continuously from this evening until Saturday morning.
Forty Royal Marines Buglers will take part from Royal Marines School of Music, and all five bands - Portsmouth, Collingwood, Plymouth, Commando Training Centre Royal Marines and Scotland.
Each drummer will play for a minimum of 1.5 hours (15 minutes at a time) during the record attempt.
The record attempt will be based at the Tower of London throughout and the drummers will be putting on regular demonstrations and offering the public the chance to try some drumming.
The record attempt is also set to raise money for the Royal Marines Charitable Trust Fund.