US American band from the Greenwich Village neighborhood of New York City that was formed in 1965 and originally split up in 1967.

Their songs drew from a wide array of musical styles. They are most remembered as one of the most artful practitioners of pop music, influenced as it was by folk, blues, rhythm & blues, jazz and the pop music of the day. On February 14, 2023, the group, still led by Steve Katz and Roy Blumenfeld, released a new collection of tunes, called Evolution.