Jake GyllenhaalJake Gyllenhaal is reportedly keen to have children with girlfriend Reese Witherspoon after having so much fun with her existing kids.

Reese shares joint custody of eight year old daughter Ava and four year old son Deacon with ex-husband Ryan Phillippe but a source told OK magazine that Jake very much enjoys playing step-dad to the pair and uncle to sister Maggie Gyllenhaal’s 20 month old daughter Ramona.

The source, who claims to be close to the Donnie Darko star told the magazine: “He knows he might be jumping the gun thinking of kids, but he knows that Reese is the one.

“He laughs and says he needs to propose and do this the right way. It really is first comes love, then comes marriage - cheesy as that sounds, it’s the way he thinks!”

The source added: “Reese has admitted that Jake has grown from when they first met into this very dependable dad type. He’s ready to have his whole life change.”

The couple are rumoured to have started dating early last year after getting to known one another on the set of Rendition but in October.