Stephen Maynard Clark (23 April 1960 – 8 January 1991) was an English musician best known as the co-lead guitarist and a principal songwriter for the British hard rock band, Def Leppard, until his 1991 death from an overdose brought on by a combination of multiple prescription drugs and alcohol. In 2007, Clark was ranked No. 11 on Classic Rock Magazine's "100 Wildest Guitar Heroes".