Sources tell Us Weekly that the 38-year-old fashion designer has reportedly tied the knot with her investment banker boyfriend Tim Leissner.
Simmons's ex husband, Russell Simmons, confirmed the news via Twitter on Wednesday.
"All of us love @OfficialKimora but the fact is she is happily married. Tim is has been family for a while now. #gossipcop....," the business mogul wrote.
The tweet came in response to rumors that the former supermodel was dating rapper Birdman. The speculation began after he posted a photo with Simmons on his Instagram account and captioned it: "S/O @OfficialKimora luv of my life. Thank u 4 everythang u did and do 4 me RICHGIRL RICHGANG."
Simmons began dating Leissner in 2013 after breaking up with longtime beau Djimon Hounsou. The couple and Simmons' three children -- Ming, 14, and Aoki, 11 and Kenzo, 4 -- were spotted together in St. Barts on Christmas Day.
Simmons has not yet confirmed that she's married.