Elijah Blue Allman (born July 10, 1976), known professionally as P. Exeter Blue, is an American musician, and the son of singer Cher and her second husband, Gregg Allman. He is the half-brother of Chaz Bono, Delilah Allman, Michael Allman, Layla Allman, and Devon Allman. Elijah is the lead vocalist, guitarist and lyricist of the industrial metal band Deadsy.