John Landrum Cooper (born April 7, 1975), professionally credited as John L. Cooper, is an American musician, singer and songwriter. He has been the lead vocalist, bassist and co-founder of the Grammy-nominated American Christian rock band Skillet since 1996.
Cooper was briefly in experimental rock group Seraph from 1989–1995. The band released a four-song demo, titled Silence E.P., before disbanding. The track listing was "Alone", "Silence", "Wild Honey", and "Fading Love".