A baby Bourne will soon be born!

Jeremy Renner is reportedly expecting a baby with an ex-girlfriend. The two weren't that serious, an insider told Us Weekly, but apparently they were serious enough to do the deed. The woman isn't officially named in the story, although they do mention one of his exes, actress Jess Macallan, with whom he had a four-year relationship until 2010. Anyway, the pregnant ex is supposedly living in his L.A. home and due to give birth next month.

Jeremy was overheard talking about his impending fatherhood with actress Eva Longoria while on the smoking patio at Sunday's Golden Globe Awards. Witnesses spilled the beans to Us Weekly, so if he was trying to keep this private ... sorry, man. Baby's out of the bag. Jeremy reportedly told Eva he was "so blown away" by the news and planned to fly in when the woman's water breaks.

Congrats to the new parents — even if they do the whole Mom and Dad thing separately.

Source: Us Weekly