It's probably the worst kept secret ever, but it's safe to say that Gisele Bundchen has got a baby on board.

gisele

When the supermodel took to the beach in her bikini, a cute little bump could be seen, suggesting she is expecting.

Gisele looked radiant in a white and grey two piece on the beach during her family holiday to Costa Rica.

gisele

It was first reported back in May that she and her American football player husband Tom Brady were expecting their second child.

They are already parents to two-year-old Benjamin.

Speaking about his birth in December 2009, she told US Vogue: "It didn't hurt in the slightest. The whole time my mind was focused in each contraction on the thought 'my baby is closer to coming out.' It wasn't like 'this is so painful'. So I transformed that intense feeling into a hope of seeing him."

> IN PICS: PREGNANT CELEBS

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  • <strong>Who's the mumma? </strong>Peaches Geldof <strong>Who's the daddy? </strong>Thomas Cohen <strong>Baby ETA: </strong>April 2013 <strong>Interesting fact: </strong>Peaches and Thomas are expecting a boy and are planning to name him Phaedra.

  • <strong>Who's the mumma? </strong>Fearne Cotton <strong>Who's the daddy? </strong>Jesse Wood <strong>Baby ETA: </strong>Late 2012 <strong>Interesting fact: </strong>Fearne had to deny she knew the sex of her baby when she referred to her bump as 'her'.

  • <strong>Who's the mumma? </strong>Imogen Thomas <strong>Who's the daddy? </strong>Adam Horsley <strong>Baby ETA: </strong>February 2013 <strong>Interesting fact: </strong>Imogen and her boyf had been dating 10 months when the star fell pregnant

  • <strong>Who's the mummy? </strong>Lily Allen <strong>Who's the daddy?</strong> Sam Cooper <strong>Baby ETA:</strong> December <strong>Interesting fact: </strong> For Lily, a source revealed, "work comes second to Sam, Ethel and now their bump. She's just so excited."

  • <strong>Who's the mummy?</strong> Sarah Michelle Gellar <strong>Who's the daddy? </strong> Freddie Prinze Jr <strong>Baby ETA:</strong> Autumn <strong>Interesting fact:</strong> The couple met on the set of <em>I Know What You Did Last Summer</em>. How - umm -romantic

  • <strong>Who's the mummy?</strong> Drew Barrymore <strong>Who's the daddy? </strong> Will Kopleman <strong>Baby ETA:</strong> She confirmed she was pregnant in June, but hasn't shared the due date <strong>Interesting fact: </strong> The couple married on 5 June, when Drew was pregnant. So that means the baby was present - aww

  • <strong>Who's the mummy?</strong> Melissa Joan Hart <strong>Who's the daddy? </strong> Mark Wilkerson <strong>Baby ETA:</strong> Unknown <strong>Interesting fact: </strong> This is the <em>Sabrina The Teenage Witch</em> star's third baby

  • <strong>Who's the mummy?</strong> Camila Alves <strong>Who's the daddy? </strong> Matthew McConaughey <strong>Baby ETA:</strong> They haven't given a due date yet, but as soon as we know you'll know <strong>Interesting fact:</strong> They have two children Levi, 3, and Vida, 2

  • <strong>Who's the mumma? </strong>Anne Hathaway <strong>Who's the daddy? </strong>Adam Shulman <strong>Baby ETA:</strong> Well, it's just rumours at the moment, so we can't be sure <strong>Interesting fact: </strong>Despite playing Catwoman in The Dark Knight Rises, it is highly unlikely that Anne will give birth to a litter

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