For the rock musician of the same name in Philadelphia, see Nightlands

David Hartley or Dave Hartley is a musician especially notable for several collaborations with Sting. Their cooperations include writing songs for the Walt Disney Animation Studios The Emperor's New Groove, arranging for the song You Will Be My Ain True Love from Cold Mountain (soundtrack), Hartley performed on the Sting albums Brand New Day and Sacred Love as a string arranger and conductor as well as playing piano and Hammond organ.