Mikey Graham and Keith Duffy
View All: Emeralds and Ivy Ball
Next Mikey Graham Slideshow: Celebrities are spotted at The Marker Hotel where TV3's Celebrity Apprentice is being filmed with this year's celebrity contestants - Dublin Ireland - Wednesday 10th July 2013
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.