It's nearly impossible to keep a secret when you're in the public eye.
Still, these celebrity moms were able to pull it off. In fact, they're so good at keeping a secret, they were actually able to keep the news of their own babies under wraps. For a little while, at least.
Take a look below to find out which moms were able to keep the ultimate secret from the media!
We only recently learned of the baby Alexis Bledel and Vincent Kartheiser had last fall. The couple has been pretty fantastic about keeping secrets, as they also kept their wedding ceremony under wraps in 2014.
Kerry Washington was able to keep the news of giving birth to her daughter Isabelle for two weeks, mainly because everyone was so distracted by the season finale of Scandal.
Hilarie Burton and Jeffrey Dean Morgan were pros at keeping their son's arrival a secret. Only two weeks after they even announced their relationship, they welcomed their baby boy, Gus.
Even though she attended plenty of awards shows, Adele was able to keep her pregnancy a secret for seven months. Then, after giving birth to her son, she refused to share photos or even tell his name for almost six months.
Ellen Pompeo and Chris Ivery's second daughter, Sienna May Ivery, was born with the help of a surrogate mother. They didn't announce her arrival until two months after she was born.
Eva Mendes and Ryan Gosling also kept their baby's birth a secret, and though the news was leaked to the tabloids, they didn't confirm it. They also kept the fact that a baby was even on the way a secret from the media.
Bijoi Philips and Danny Masterson posted photos of their new baby daughter, Fianna Francis, a week after she was born. Before that, no one even knew the couple was expecting.
True Blood stars Anna Paquin and Stephen Moyer kept the birth of their twins, who were born premature, a secret for several months. They also waited about a year to reveal their names.
Anne Hathway didn't keep her pregnancy a secret, but the news of Jonathan Rosebanks Shulman's arrival didn't break until two weeks after he was born.
Glee star Naya Rivera and husband Ryan Dorsey were open about expecting their first child, but they kept their son's birth a secret for about two weeks.
Actress Carey Mulligan and husband Marcus Mumford were able to keep the birth of their baby girl, Evelyn Grace Mumfod, a secret for three weeks after she was born.
Actress Neve Campbell wasn't secretive about her pregnancy, but no one knew that her son had actually been born until she was seen holding him at the beach one day.
Actress Charlize Theron adopted her son jackson in 2012, but the news wasn't announced until two months later.
Nicole Kidman and husband Keith Urban decided to keep their daughter Faith Margaret, who was born via surrogate, a secret until three weeks after she was born.
Leightom Meester and Adam Brody are also known for keeping their personal lives under wraps. They kept the birth of their daughter, Arlo Day Brody, a secret for nearly two months.
Actress Laura Linney kept her entire pregnancy a secret. It wasn't until a week after her son Bennett Armistead Schauer was born that the media found out.