John James Sykes (born 29 July 1959) is an English guitarist, best known as a member of Whitesnake, Thin Lizzy and Tygers of Pan Tang. He has also fronted the hard rock group Blue Murder and released several solo albums. Following a stint in the heavy metal band Tygers of Pan Tang in the early 1980s, Sykes joined Irish hard rock group Thin Lizzy for their 1983 album Thunder and Lightning.