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Alice Cooper had a performance at London’s 100 Club last night and was eventually joined on stage by Johnny Depp.

Before the show, Cooper posted a photo on Facebook of Depp backstage, guitar in hand, along with the caption, “Johnny Depp!! Waiting to jump on stage with Alice for ’18′ and ‘Schools Out!’”

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Depp played guitar for “I’m Eighteen” and a medley of “School’s Out” and Pink Floyd‘s “The Wall”. He was introduced as “Johnny D from Kentucky”. When Depp left, Cooper said: “I think we can use another guitar player. If this whole movie thing doesn’t work out, call us.”

The two are both in the new Tim Burton movie Dark Shadows, which will be out May 2012.

Watch videos of the performances…