Actorsmic_mathe_55800751_600 Just when you thought "Dexter" could not possibly get any ickier.

Michael C. Hall and Jennifer Carpenter, who play brother and sister on Showtime’s hit series about a serial killer who kills the guilty, are now husband and wife.

According to Yahoo, Hall’s spokesman, Craig Bankey, has revealed that the couple eloped in California on New Year’s Eve.

They’ll walk the red carpet together at the Golden Globe Awards on Sunday, acknowledging their relationship for the first time publicly in a big way.

Hall, 37, and Carpenter, 29, just finished the third season of Showtime’s "Dexter.”

The pair has been quietly dating for about a year and a half.

What’s even creepier is they really do look like brother and sister.

Sorry, I know it’s only a fictional TV connection. I’ll get past this but right now, it’s freaking me out.

Photo: Michael and Jennifer at the Emmy Awards last year.

Credit: WireImage

Posted by:Elizabeth Snead