Mervyn "Muff" Winwood is a British songwriter and record producer, and the elder brother of Steve Winwood. Both were members of the Spencer Davis Group in the 1960s, in which Muff Winwood played bass guitar. Following his departure from the group he became an A&R man and record producer.

Stephen Lawrence Winwood is an English musician and songwriter whose genres include blue-eyed soul, rhythm and blues, blues rock and pop rock. Though primarily a guitarist, keyboard player and vocalist, prominent for his distinctive soulful high tenor voice, Winwood plays other instruments proficiently, including drums, mandolin, bass and saxophone.