John Primer is an American Chicago blues and electric blues singer and guitarist who played behind Junior Wells in the house band at Theresa's Lounge and as a member of the bands of Willie Dixon, Muddy Waters and Magic Slim before launching an award-winning career as a front man, carrying forward the traditional Windy City sound into the 21st century.

Morris Holt, known as Magic Slim, was an American blues singer and guitarist. Born at Torrance, near Grenada, Mississippi, the son of sharecroppers, he followed blues greats such as Muddy Waters and Howlin' Wolf to Chicago, developing his own place in the Chicago blues scene.