Matthew Broderick wil be among this year's headliners for the annual July 4th celebration on the National Mall. Broderick will be joined by Josh Turner, composer John Williams and others. Broderick will perform Broadway tunes with Kelli O'Hara during "A Capitol Fourth," which takes place on the West Lawn of the U.S. Capitol. The performances will be followed up by a fireworks show. Williams will conduct and Olympic-themed show, while Olympian Apollo Anton Ohno will host part of the evening with "Dancing With The Stars" Tom Bergeron playing emcee for the majority of the night. The event is free and will air live on PBS beginning at 8 p.m.