"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."

As the rock world and fans alike mourn Ozzy Osbourne's death at age 76, some of his peers teamed up to pay tribute.

Johnny Depp joined Alice Cooper on stage at London's O2 Arena to honor the late Ozzy Osbourne, who passed away at 76 after battling Parkinson's diseas

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.

"He was and will continue to be a rock n roll legend," Cooper said in a statement, hours after Osbourne died on Tuesday.

Depp and Cooper performed Black Sabbath's "Paranoid" during a sold-out show at the O2 Arena in London on July 25

The sweet tribute, which came from Osbourne's former daughter-in-law, featured many never-before-seen photos of the late rocker.

Noel and Liam Gallagher just paid a tribute to the late legend, Ozzy Osbourne.