The 32-year-old Brazilian supermodel is now a mum to a little girl named Vivian, her second child with American football star Tom Brady.
She has taken to her Facebook.com page to share her delight about her growing family, and to thank fans for their support.
Bundchen writes, ""We feel so lucky to have been able to experience the miracle of birth once again and are forever grateful for the opportunity to be the parents of another little angel.
""She is healthy and full of life. Thank you all for your support and well wishes. We wish you and your families many blessings.""
The former Victoria's Secret Angel also has a two-year-old son named Benjamin with the sports star, who she married in 2009.