The stylist gave birth to a baby boy over the weekend and shared the big news via Twitter. The 42-year-old tweeted, "So excited to welcome our baby boy into the world...he's 7 lbs 12 oz, beautiful, healthy and we couldn't be happier," on Sunday.
This is the second child for Rachel and her husband Roger Berman, who already have a 2-year-old together, Skyler.
The reality stars have been married since 1996 -- we're sure that the fashionable pair is thrilled to add another little guy to their beautiful family.
Congrats to the happy couple -- click "Launch Gallery" above to see even more expecting celebrities!