Two legendary hard-rock artists — Alice Cooper and Black Sabbath‘s Geezer Butler — have joined the already-star-packed lineup for the Ronnie James Dio virtual birthday celebration that takes place online Saturday, July 10, starting at 5 p.m. ET.

The benefit event, which coincides with what would have been the late metal icon’s 79th birthday, will be viewable at RollingLiveStudios.com and will feature a variety of performances, interviews and “special birthday messages” from the participating artists.

The previously announced artists taking part in the commemorative bash include Judas Priest‘s Rob Halford, Sammy Hagar, Black Sabbath‘s Tony Iommi, Guns N’ Roses bassist Duff McKagan, ex-Skid Row singer Sebastian Bach, Lita Ford, longtime Motörhead drummer Mikkey Dee, Deep Purple‘s Glenn Hughes, Judas Priest drummer Scott Travis, Tenacious D, Anthrax‘s Joey Belladonna, GN’R drummer Frank Ferrer, former GN’R guitarist Gilby Clarke, drumming brothers Carmine and Vinnie Appice, former Quiet Riot bassist Rudy Sarzo, ex-Whitesnake drummer Brian Tichy, current Thin Lizzy frontman Ricky Warwick, and various alums of the Dio band.

The event will raise money for the Stand Up and Shout Cancer Fund, a charity founded in Dio’s memory following his 2010 death from stomach cancer.

Tickets and special merchandise can be purchased at RollingLiveStudios.com/Dio. In addition, tickets are available now for a special virtual VIP afterparty scheduled for Sunday, July 11, at 5 p.m. ET.

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