Guest - various celebrities attend La Legende de la Palme d Or special screening - London, United Kingdom - Wednesday 25th November 2015 (1 Picture)
Photo credit: Tim McLees
The live album is set for released in November.
The movie begins filming in the UK.
The 'Sherlock' and 'Doctor Strange' star joined Gilmour onstage at the Royal Albert Hall for a rendition of the Pink Floyd classic.
Time to learn what Kathy Bates' character has to do with all of this.