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Eva Mendes and Ryan Gosling -

The celebrity pair managed to keep their pregnancy with first daughter, Esmeralda Amada, quiet for seven months. We heard about their second baby just before the birth.

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Kylie Jenner -

In uncharacteristically Kardashian fashion, youngest sister Kylie and Travis Scott stayed under the radar while she was pregnant with baby Stormi.

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Rachel McAdams -

The actress gave birth to a son in April 2018, but until that point we did not even know for certain that she was expecting.

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Adele -

Although the singer did announce her pregnancy publicly in June 2012, she then went off grid until the birth of her son (which was announced by an anonymous source).

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Tyra Banks -

Tyra Banks announced the arrival of her son York Banks Asla in 2016. She used a heartfelt Instagram post to thank the surrogate mother who had carried him.

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Kerry Washington and Nnamdi Asomugha -

Kerry Washington is very adept at keeping her private life private. She kept her first pregnancy under wraps for four months, and her second for even longer.

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Isla Fisher and Sacha Baron Cohen -

The couple now have three children together and the only reason we knew the actress was pregnant with the third was that she pulled out of 'Now You See Me 2.'

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Leighton Meester and Adam Brody -

Having kept their wedding private, the couple followed suit with their baby girl, Arlo Day Brody. We know she exists from the birth certificate, but there are few photos.

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Keri Russell and Matthew Rhys -

Although the couple's pregnancy was outed by their co-star Noah Emmerich, they kept things low-key and only garnered attention once the baby was born.

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Ellen Pompeo -

When her first baby, Stella, was born via surrogate in 2011, the fact was kept secret for weeks. The same happened when her third baby was born in 2016.

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Jessica Chastain -

The actress and her husband became parents via a surrogate in April 2018, but this was not announced until November of the same year.

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Laura Linney -

When quizzed about why she kept her pregnancy with son Bennett a secret, she argued that she didn't, she simply didn't advertise the fact.

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Joseph Gordon-Levitt -

The actor is famously private about his family—we didn't hear about either of his children until at least a month after they were born.

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Lucy Liu -

In 2015, the actress took to Instagram to welcome her son, Rockwell Lloyd Liu. It was later confirmed he was born through a gestational carrier.

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Donald Glover -

Donald Glover confirmed the arrival of his son during a speech at the 2017 Golden Globes, but very little else is known about the baby or his mother.

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Viola Davis -

Although Viola Davis had announced that she and her husband were in the process of adopting, it nonetheless came as a surprise when she became a mom in October 2011.

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Sandra Bullock -

When Sandra Bullock adopted a baby in January 2010, she somehow managed to keep it a secret despite being in the awards season spotlight following 'The Blind Side.'

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Anna Kournikova and Enrique Iglesias -

The couple kept their love under wraps for 17 years. It's perhaps unsurprising, then, that they managed to keep their pregancy with twins private for the full nine months!

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Alexis Bledel -

The 'Gilmore Girls' star and her husband are notoriously private—we only found out about their child after co-star Scott Patterson let it slip in an interview.

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Zoe Saldana -

We may have known about the actress' twin boys, but it came as a shock to most of the world when it was revealed she now has a third son!

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Nicole Kidman and Keith Urban -

The arrival of the celebrity couple's second daughter was kept a secret until she was born. They welcomed baby Faith Margaret in December 2011.

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Rashida Jones -

The actress kept her pregnancy remarkably quiet, only announcing her baby with musician Ezra Koenig after she was born.

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Gabrielle Union and Dwayne Wade -

Given her mom was so vocal about her struggles with fertility and IVF, it's perhaps unsurprising we didn't hear about baby Kaavia James until she arrived.

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Ricky Martin -

The singer kept the arrival of his baby girl secret until New Year's Eve 2018, when he announced she was with his family, safe and sound.

See also: Celebrities who looked amazing pregnant.

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