President Barack Obama, former President Jimmy Carter and former President Bill Clinton will be joined by civil rights activist and Rep. John Lewis (D-GA), , Caroline Kennedy, LBJ's daughter Lynda Johnson Robb, Oprah Winfrey, Forest Whitaker and Jamie Foxx at the commemoration of the 50th anniversary of the March on Washington and Martin Luther King Jr.'s "I Have A Dream Speech." BeBe Winans, LeAnn Rimes and the girl group Identity4Pop are among the scheduled performers.

Watch live, courtesy of NBC News, below: