The couple are delighted by the news and Gisele 'can't stop' talking about it.

'Tom and Gisele didn't care if they had a boy or a girl, just as long as everything was ok with the child...But now that Gisele knows it's a boy, she's so excited, she can't stop telling people,' said the source.

Brady, who has a two-year-old son with actress Bridget Moynahan, recently spoke of his excitement at becoming a father again, insisting it will be easier than his American football training.

'It couldn't be harder than this training camp, so I'll be prepared,' the 32-year-old said.