Harry Connick Jr., Mariska Hargitay

There's a new man in Olivia Benson's life.

Law & Order: Special Victims Unit has booked Emmy and Grammy winner Harry Connick Jr. for a four-episode arc, TVGuide.com has learned. NBC is expected to announce Connick's casting Friday at the Television Critics Association winter previews.

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Connick, who is currently starring on Broadway in On a Clear Day You Can See Forever, will play Executive Assistant District Attorney David Haden, a committed, straight-shooting prosecutor who is assigned a case with Detective Benson (Mariska Hargitay). While Benson is initially wary of Haden, they both soon learn that they make good team. And that teamwork will spill out of the courtroom. (Don't believe us? Watch the video clip below!)

The relationship comes as Benson continues to deal with the loss of her partner, Elliot Stabler, who was written out of the show after Christopher Meloni elected not to renew his contract for the NBC procedural's 13th season.

"This is a home run on so many levels," Hargitay said of Connick's casting. "The show is very fortunate to have Harry's extraordinary talent, and I'm lucky because I get to work with my friend. I think Olivia couldn't have asked for a better companion to take her through a new stage in her life and career." 

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Connick, 44, is a three-time Grammy and two-time Emmy winner, most recently for the musical direction of his live concert TV special. He has appeared in the films Hope Floats, Independence Day, Copycat, P.S. I Love You and Dolphin Tale. On the small screen he's best known for his recurring role as Dr. Leo Markus on NBC's Will & Grace.

SVU airs Wednesdays at 10/9c on NBC. Connick's arc begins Jan. 18.