Chicken Shack are a British blues rock band founded in 1965 by Stan Webb, Andy Silvester, and Alan Morley, who were later joined by Fleetwood Mac’s Christine McVie, then still known as Christine Perfect. They signed to the legendary British blues label Blue Horizon in 1967.

O.K. Ken? is the band's second studio album from 1969 and reached #9 in the UK Albums Chart. The record was Perfect's last album as a member of Chicken Shack; she would join Fleetwood Mac a year later in July 1970. Her tune "Get Like You Used to Be" from the album became a staple of Fleetwood Mac's live act until 1975.

O.K. Ken? is available with the original UK cover, as a limited edition of 1000 individually numbered copies on red vinyl.