Vivian Patrick Campbell (born in August 25, 1962 in Belfast, Ireland) is an Irish rock guitarist, currently playing for Def Leppard. However, he was already known as a proficient shredding style guitarist in the early 80's, before joining the band in 1992, first with the Irish rock band Sweet Savage, then with Dio. He also joined Thin Lizzy in 2011-2012 and founded a Dio cover band named Last in Line with three other former members of the band.