Washington, Apr 18 (ANI): Jason Segel has finally confirmed that he is dating Michelle Williams, and says that they just want to be happy.

Rumours of the two dating evolved after they were spotted laughing and walking hand-in-hand through New York City a few weeks ago.

I think we would just very much like to be happy. That's all I'm going to say about it, Us magazine quoted him as telling US television show 'Extra'.

His current co-star and off-screen friend Emily Blunt jokes that the 32-year-old actor has significantly matured thanks to Williams.

He's a man-boy! He used to be a boy-boy and now he's a man-boy, Blunt said.

I think I might even be becoming a man-man... potentially! Joked Segel.

According to insiders, Segel has been trying to be more of a grown-up lately to show his commitment to Williams, single mom to daughter Matilda.

He is taking care of himself more, exercising, eating right and dressing better. Basically, not acting like a frat boy anymore, the insider said.

Friends for years via mutual friend Busy Philips, the couple's relationship kind of happened overnight! another pal marveled. (ANI)