"Pirates of the Caribbean" star Johnny Depp joined Alice Cooper on stage in London Friday to honor late rock icon Ozzy Osbourne with a performance of Black Sabbath's hit "Paranoid."

Fans at London’s O2 Arena got more than they bargained for when Johnny Depp made a surprise appearance during a high-voltage Ozzy Osbourne tribute.

For the cover during the London gig, Cooper was joined by actor/guitarist Johnny Depp, who made a late entry onto the stage and locked in alongside Nita Strauss, Ryan Roxie and Tommy Henriksen to hold down Tony Iommi’s iconic riff.