current line-up is Vivian Campbell
and vocals, Rick "Sav" Savage
on bass and vocals, Joe Elliott
on lead and vocals, Phil Collen
on guitars and vocals and Rick Allen
In 1977, Rick Savage started Atomic Mass with Peter Willis in Sheffield,Uk. Pete got both Steve "Steamin" Clark, who became the 2nd guitarist, and Joe Elliott, lead vocalist in the band. Drummer Tony Kenning completed the line-up, and Def Leppard was born.
Officially, they have released 9 albums between 1980 and 1999.
Discography detailed by ShadowLost.