With all eyes on Beyonce at Glastobury last night, perhaps Johnny Depp thought his stint as a rockstar would go unnoticed. The actor unexpectedly joined Alice Cooper onstage at an intimate gig at the 100 Club in London last night to promote Cooper's new album Welcome 2 My Nightmare. Johnny helped Alice Cooper, real name Vincent Damon Furnier, perform two hits at the Oxford Street gig - I'm Eighteen and School's Out. The 48-year-old jumped onstage towards the end of the 75-minute set, Alice introducing him as 'the blues master, Mr Johnny D from Kentucky,' according to NME. The duo - playing alongside band members Chuck Garric and Damon Johnson - thrilled the small audience, which included former X Factor contestant Katie Waissel. The singer excitedly tweeted: 'Oh my god johnny depp just got on stage with Alice cooper wtf omg I love this right now I'm speechless!
Before the show, the 63-year-old rocker teased fans by posting a picture of his band rehearsing on his Facebook page. 'Chuck and Damon go over a few notes with tonight's Special Guest... Oh you'll never guess don't even bother...' he wrote. Guns N Roses guitarist Slash had been rumoured to be the guest joining Cooper onstage. Depp is not stranger to the music scene - he owned notorious LA club The Viper Room from its opening in 1993 to 2004. He has appeared as a guest performer for a number of bands, including Oasis singles Fade In-Out and Fade Away, on Shane McGowan of the Pogues first solo album as well on the sound tracks for his films Chocolat and Once Upon a Time in Mexico. In the early Nineties he was a member of the band P, with Gibby Haynes, Sal Jenco, Flea from Red Hot Chili Peppers and Steve Jones from Sex Pistols.

A blog on Alice Cooper's official website wrote of the gig: 'Bassist Chuck Garric and Depp seemed like old buddies up there, the three stage right guitarists were laughing and clearly enjoying themselves.' Alice even offered Deep a place in the band after the performance, joking: 'I think we could use another guitar player. If this whole movie thing doesn't work out, call us.' Johnny is currently in town working on yet another Tim Burton project, Dark Shadows, with Helena Bonham Carter, Michelle Pfeiffer and Kick-Ass star Chloe Moretz - and according to Cooper's website, the rocker is rumoured to be filming a cameo in the horror movie. Alice Cooper performed several classics and a range of covers including Back In The USSR, You Really Got Me and We Gotta Get Out Of This Place.