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Morgan MacGregor, Michael C. Hall

Jenny Anderson/WireImage

Michael C. Hall is a married man!

The Dexter star is the latest star to pull one of those (now) popular surprise nuptials by tying the knot to his longtime girlfriend Morgan Macgregor in New York City today. The couple exchanged vows at New York City Hall, the actor's rep tells E! News.

No other details about their surprise ceremony have been revealed.

The 45-year-old star and Macgregor, a Los Angeles-based book reviewer and novelist, have been dating for nearly four years. The two lovebirds made their first public appearance together on the red carpet at the 2012 Emmy Awards.

This is Hall's third marriage. He was previously married to actresses Amy Spanger and his Dexter co-star Jennifer Carpenter, whom he wed in 2008 and divorced in 2011.