Ethan John Luck is an American musician, producer, multi-instrumentalist and photographer who has played in several bands, most prominently, the ska band The O.C. Supertones, Demon Hunter, Kings of Leon, Morgan Wade, and pop punk band Relient K. He has played on albums for Kutless, Roper, Nikki Clan and Last Tuesday.

Demon Hunter is an American Christian metal band from Seattle, Washington, formed by brothers Don Clark and Ryan Clark in 2000. Ryan is the band's only remaining original member, as Don left in 2009. As of the 2010s, the band has sold over 600,000 albums.