Junior died from kidney failure and had a weak heart, his son Marvin Junior Jr. told ABC7. He says his father died surrounded by family in his home in Harvey around 3:15 pm on Wednesday afternoon.
He grew up in suburban Harvey and began singing together with the other members of the group while attending Thornton Township High School.
The Dells formed in 1952 under the name The El-Rays. In 1956, they recorded their first hit, "Oh What a Night."