Seth Rogen gives girlfriend an engagement ring

Funnyman Seth Rogen proposed to his girlfriend with an engagement ring while she was getting dressed.

Seth Rogen presented his girlfriend with an engagement ring while she was topless.

The 40-Year-Old Virgin and Knocked Up star told US talk show host Conan O'Brien how he popped the question to Lauren Miller.

He went on to say that the nerves were getting the better of him before he proposed, stating: "All I could think of was this ring. Like 'Don't say Lord of the Rings!' Don't mention anything about a ring!"

Rogen – who was on the Conan show to promote his upcoming film the Green Hornet, admitted that he chose an unusual moment to go down on one knee, as his girlfriend was mid-way through changing in the couple's closet.

Recently, celebrity couple Nick Lachey and Vanessa Minnillo got engaged after the former Newlyweds star presented his actress girlfriend with an Asscher-cut diamond ring.

The pair said in a statement they are anticipating a "wonderful future together".