The model let her tummy do the talking in July when she stepped out with a growing baby bump on the red carpet at the London premiere of 'The Dark Knight Rises'.
A representative for Guy confirmed the news, but the notoriously private couple - who welcomed son Rafael in September, 2011 - refused to comment on the news.
However, it's now emerged that Jacqui has recently given birth to a daughter.
A representative for the couple told WENN: "We can confirm that Guy and Jacqui are the proud parents of a new baby girl. Mother and baby are doing well."
It's been an eventful year for the couple - it emerged in October that they had become engaged.
As well as Rafael, Guy is also father to sons Rocco and David from his marriage to Madonna, which ended in 2008.
Who's the mumma? Peaches Geldof Who's the daddy? Thomas Cohen Baby ETA: April 2013 Interesting fact: Peaches and Thomas are expecting a boy and are planning to name him Phaedra.
Who's the mumma? Fearne Cotton Who's the daddy? Jesse Wood Baby ETA: Early 2013 Interesting fact: Fearne had to deny she knew the sex of her baby when she referred to her bump as 'her'.
Who's the mumma? Imogen Thomas Who's the daddy? Adam Horsley Baby ETA: February 2013 Interesting fact: Imogen and her boyf had been dating 10 months when the star fell pregnant