Sister Sledge is an American musical group from Philadelphia, Pennsylvania, formed in 1972 and consisting of four sisters: Kim Sledge (born August 21, 1958), Debbie Sledge (born July 9, 1954), Joni Sledge (born September 13, 1957), and Kathy Sledge (born January 6, 1959). They released their first two albums "Circle Of Love" and "Together" in 1975 and 1977 garnering moderate sales. Their career went into decline before it revived under the production skills of Nile Rodgers and Bernard Edwards of Chic. This association gave them their biggest successes during 1979: the popular disco anthem "We Are Family". Along with the tracks, "He's the Greatest Dancer" and "Lost in Music", the album "We Are Family" reached number one on the disco charts in 1979.