The Delfonics are a pioneering soul group from Philadelphia, celebrated as one of the architects of the silky “Philly Sound.” Formed in the mid-1960s by brothers William and Wilbert Hart with Randy Cain, they gained fame through their lush harmonies, romantic themes, and the sophisticated production of Thom Bell. Their chart-topping hits, including timeless classics like “La-La (Means I Love You)” and “Didn’t I (Blow Your Mind This Time),” helped shape R&B and soul for generations, earning them a Grammy Award and enduring influence across genres.