On January 21, Audra McDonald and Brian Stokes Mitchell will headline Let Freedom Ring!, the Kennedy Center and Georgetown University’s annual Martin Luther King Jr. tribute concert. The duo will join the Let Freedom Ring Choir and music director Rev. Nolan Williams Jr. for an evening of music and spoken tributes. Thanks to the Millenium Stage performance series, free tickets will be offered to the performance. If you are in the D.C. area, general admission tickets will be distributed in the Hall of Nations beginning at 4:30 p.m.