The band shared on Instagram a montage of pictures and videos of Clark performing, captioning the post, "Remembering Steve Clark today. Happy birthday, you are missed dearly."
Clark, born April 23, 1960, joined Def Leppard in 1978 and appeared on their 1980 debut album, On Through The Night. His last album with the band was 1987's Hysteria, which went to #1 and featured the #1 hit "Love Bites," along with classic tunes "Pour Some Sugar On Me," "Animal," "Armageddon It" and more.