The Cowsills is an American rock and roll and pop group. The Cowsills are six siblings and their mother all of whom have played in the band at some point in time. The band was formed in 1965 by brothers Bill, Bob and Barry. The band’s self-titled debut album was released in 1967 and left an impressive mark on the US music charts. "The Rain, the Park & Other Things," “Hair” and “Indian Lake” are a few of the group’s notable works.