In 2007, Tony Iommi, Geezer Butler, Ronnie James Dio, and Vinny Appice, who made up the line ups for Black Sabbath's Mob Rules and Dehumanizer albums, reunited to tour in support of the Black Sabbath Dio Years compilation. With the original Black Sabbath line up having reunited several times and technically still in place, Tony Iommi (owner of the Black Sabbath name), decided that this line up would tour under the moniker Heaven & Hell, the name of the first Black Sabbath album to feature Ronnie James Dio on vocals (although, ironically, Vinny Appice did not appear on that album). The tour (and resulting live album) were such a success that the group announced that they decided to continue working together, with all new material coming from this group to be released under the Heaven & Hell name. Their first Heaven & Hell studio album, The Devil You Know, was released in April 2009.