It's a boy!
A rep confirms to Us Weekly the birth of baby Stuber and tells Us he weighed in a little over 7 lbs. No name has been revealed yet.
Sims, 39, married movie producer Stuber, 43, last September. The model/actress told Us last month she was beginning to get nervous about the birth of her son -- and so was Stuber!
But Sims did have her son's nursery ready.
"It's kind of bohemian, modern chic," she shared. "We have made it so cool. I'm so happy. It's my favorite room!"