The "Good Wife" actor reportedly tied knot at Italian restaurant II Cantinori in New York City on Friday night.
Flack, a former ballet dancer with the NYC Ballet, is best known for writing the 2011 novel-turned TV show, "Bunheads."
Although Charles, 41, has kept his relationship with Flack quite private, it's fair to assume the two have been dating for a least a couple of years as they were spotted walking the 63rd Primetime Emmy Awards together in September 2011. In addition, the two attended Alec Baldwin's wedding to Hilaria Thomas in June 2012 as a couple.
Astronomers offer more expansive view of universe
McPhee, Cokas 'working on their marriage' after affair