Though married for more than ten years, this will be the first time the two of them will be acting together.

"We are excited to see the on-screen chemistry and emotion this incredibly talented husband and wife team will bring to our show," said executive producer David Zabel. "Fans are in for a treat and we couldn't be more thrilled that they chose ER to make their first appearance together."

Vance is perhaps best known for his five-year run on NBC's drama Law & Order: Criminal Intent as New York Assistant District Attorney Ron Carver. Vance's talents also translate well to the big screen and are apparent in his roles in films such as Clint Eastwood's Space Cowboys, The Preacher's Wife opposite Whitney Houston and Denzel Washington, and The Hunt for Red October.

On the small screen, Vance starred in the Emmy-nominated production of The Boys Next Door, as well as the Emmy-nominated television movie, The Tuskegee Airmen opposite Laurence Fishburne (who also made the news for his new role on CSI) and Andre Braugher.

Most recently, Vance and wife Angela Bassett completed their first book, Friends: A Love Story that chronicles their story about healthy relationships, love and family.

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