Sources revealed to People that the supermodel and her husband, Tom Brady, welcomed a baby boy.
Details concerning the baby’s birth and name are still being kept under wraps.
Last week, Brady revealed that he knew the sex of the baby, but said that he was the only one to know since his wife wanted to keep it a surprise.
The Patriots quarterback stated, "I’m really the only one that knows at this point. My dad asked me. I haven’t told him. [Gisele] doesn’t know. It’s a pretty good feeling knowing something that no one else knows."
This is the first baby for Bündchen. Brady, 32, is also father to a 2-year-old boy, John, who was born from his relationship with Bridget Moynahan.
The football player tied the knot with Bündchen, 29, during a private ceremony in Los Angeles last February. In April, they held another wedding ceremony in Costa Rica for their family and friends.
Representatives for the two stars have not yet commented on the latest news.