The Cyrkle was an American rock and pop band active from 1961 to 1968, known for their incorporation of baroque pop and folk-rock elements. They gained significant recognition for their hits "Red Rubber Ball," co-written by Paul Simon, and "Turn-Down Day," which showcased their signature harmonized vocals and jangly guitar sound. The band, initially discovered and managed by Beatles' manager Brian Epstein, played a role in the mid-1960s pop-rock scene. Despite their brief period of activity, The Cyrkle left a lasting impression in the pop-rock genre.