Finally... it's a boy!

She has soldiered on heavily pregnant for weeks now. But Jennifer Garner has finally given birth to her third child. 

The 39-year-old actress who is married to actor Ben Affleck has given birth to a son who joins the couple's daughters Violet, six and Seraphina, three. 

And the little girls will no doubt be delighted to have a little brother.

Few details have been released on the birth however a source confirmed the happy news to Us Weekly. 

A spokesperson for the couple were unavailable for comment when contacted by MailOnline earlier today. 

The couple, who have been married for seven years, announced Jennifer’s third pregnancy in August 2011.

The actress did not use her pregnancy as the opportunity to put her feet up and instead was seen running errands almost daily.