Alex J. Berliner/BEImages
October 04, 2010 01:35 PM

Seth Rogen is off the market!

The actor and his girlfriend Lauren Miller are engaged, a source confirms to PEOPLE.

“Seth is so excited,” the source says. “Lauren is such a sweet girl. She makes him really happy.”

Rogen, 28, has starred in a series of hit comedies, including The 40-Year-Old Virgin, Knocked Up, Superbad and Pineapple Express.

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Miller, also 28, who lives with Rogen in his Los Angeles home, has had small roles in a few of his films, including Superbad and Zack and Miri Make a Porno.

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