Bernard John Marsden was an English rock and blues guitarist. He is primarily known for his work with Whitesnake, having written or co-written with David Coverdale many of the group's hit songs, such as "Fool for Your Loving", "Walking in the Shadow of the Blues", "Ready an' Willing", "Lovehunter", "Trouble", and "Here I Go Again".

Whitesnake are an English hard rock band formed in London in 1978. The group was originally put together as the backing band for singer David Coverdale, who had recently left Deep Purple. Though the band quickly developed into their own entity, Coverdale is the only constant member throughout their history.