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Dennis "Dee Tee" Thomas, a founding member of the long-running soul-funk band Kool & the Gang known for such hits as "Celebration" and "Get Down On It," has died. He was 70.

He died peacefully in his sleep Saturday in New Jersey, where he was a resident of Montclair, according to a statement from his representative.

The band announced his death in a Facebook post. 

"An original member of Kool & the Gang, Dennis was known as the quintessential cool cat in the group, loved for his hip clothes and hats, and his laid-back demeanor," the band's statement said. "A huge personality while also an extremely private person, Dennis was the alto saxophone player, flutist, percussionist as well as master of ceremonies at the band’s shows. Dennis’ prologue featured on the groups 1971 hit, ‘Who’s Gonna Take the Weight’ is legendary and an example of his showmanship."

"Dee Tee was the group’s wardrobe stylist who made sure they always looked fresh. In the band’s early days, Dennis also served as the "budget hawk", carrying the group’s earnings in a paper bag in the bell of his horn," the statement added.

Born Feb. 9, 1951, in Orlando, Florida, Thomas was known for his prologue on the band’s 1971 hit, "Who’s Gonna Take the Weight." Known for his hip clothes and hats, he was also the group’s wardrobe stylist. In the early days, he served as their "budget hawk," carrying their earnings in a paper bag stuffed into the bell of his horn, the statement said.

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Dennis Thomas performs on stage in Pennsylvania.

In this Aug. 3, 2008 file photo, Dennis Thomas performs with the band "Kool and the Gang" in concert in Bethlehem, Pa. Dennis "Dee Tee" Thomas, a founding member of the long-running soul-funk band Kool & the Gang, has died. Thomas died peacefully in his sleep Saturday, Aug. 7, 2021 in New Jersey, where he was a resident of Montclair. (Photo by: Joe Gill/The Express-Times via AP)

In 1964, seven teen friends created the group’s unique bland of jazz, soul and funk, at first calling themselves the Jazziacs. They went through several iterations before settling on Kool & the Gang in 1969. The group’s other founders are brothers Ronald and Robert Bell, and Spike Mickens, Ricky Westfield, George Brown and Charles Smith.

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The band has earned two Grammy Awards and seven American Music Awards. They were honored in 2014 with a Soul Train Lifetime Achievement Award. Their music is heavily sampled and featured on film sound tracks, including those for "Rocky," "Saturday Night Fever" and "Pulp Fiction."

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Among those Thomas is survived by are his wife, Phynjuar Saunders Thomas, daughter Tuesday Rankin and sons David Thomas and Devin Thomas.