Hollywood's hottest couple, Ryan Gosling and Eva Mendes, have reportedly welcomed their first child together - a baby girl.

US Weekly reports that the couple welcomed their daughter on Friday September 12th, though a representative for the couple has not yet confirmed the news.

News of the pregnancy broke in July with US talk show host Ellen DeGeneres confirming the happy news. The couple are believed to have been seven months along when the Ellen tweeted the announcement.

In a 2011 interview, Ryan said 'I’ll make movies until I make babies. I have no idea when the handover will happen,” continuing “When someone comes along [to make babies with] I don’t think I’ll be able to do both and I’m fine with that.”

It is believed the famously private pair began dating in 2011.

Ryan Gosling and Eva Mendes 'welcome baby girl'