While not many details are known as of yet, US magazine have confirmed the birth of the couple's third child together.
The couple were married in 2010 and their new arrival will join big sisters, Olive (8) and Elula (5).
News of Isla's pregnancy broke last October and the actress has always been very open about the importance of her family, saying: "Family is 100% my top priority."
Congratulations to the happy family on their new arrival - our best wishes to mum and baby.
