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Seth Rogen has yet to officially announced his engagement to longtime girlfriend Lauren Miller ("no coment," his rep tells

But Steve Carell, his costar in The 40 Year Old Virgin, couldn't be more thrilled.

"I’m just happy for him. That’s good news," he told Us Saturday at Comedy Central’s Night of Too Many Stars in NYC. "It’s excellent."

Rogen and Miller, both 28, are not only living together in L.A. -- they've also shared some screen time, She's appeared in his flicks, including Superbad and Zack and Miri Make a Porno.

Rogen can next be seen in The Green Hornet, out next year.