Denis Patrick Seamus O'Hare (born January 17, 1962)[2] is an American actor noted for his award-winning performances in the plays Take Me Out and Sweet Charity, as well as portraying vampire king Russell Edgington on the HBO fantasy series True Blood.

In 2011, he starred as Larry Harvey in the first season of the FX anthology series American Horror Story, for which he was nominated for a Primetime Emmy Award for Outstanding Supporting Actor in a Miniseries or a Movie in 2012.

He won the 2005 Drama Desk Award for Outstanding Featured Actor in a Musical for his role as Oscar Lindquist in the Broadway revival of Sweet Charity.

In 2004, he played Charles J. Guiteau in the Broadway production of Stephen Sondheim's Assassins, for which he was nominated for the Best Performance by a Featured Actor in a Musical Tony Award.

His feature film credits include The Anniversary Party,[11] 21 Grams, Garden State, Derailed, Michael Clayton, A Mighty Heart, Half Nelson, Milk, Edge of Darkness, Charlie Wilson's War and Changeling.

In 2010, O'Hare joined the cast of HBO's True Blood in its third season as Russell Edgington, the vampire king of Mississippi who is 2,800 years old.

O'Hare portrayed con artist, Stanley on the fourth season of the series, American Horror Story: Freak Show.

Most recently, O'Hare portrayed the Provincetown resident Holden Vaughn on the tenth season, American Horror Story: Double Feature.