Matthias Keller (born 1956 in Bremen) is a German composer, music critic, organist, conductor, and radio producer. For many years he has been a juror for the Preis der deutschen Schallplattenkritik. He has been commissioned to compose or arrange works for the Berlin Radio Symphony Orchestra, the Capella Istropolitana, the , the Munich Symphony Orchestra, the Nordwestdeutsche Philharmonie, and the among others. He notably composed the music for the closing ceremonies of the 2006 FIFA World Cup which was performed simultaneously by the Munich Philharmonic Orchestra, the Bavarian State Orchestra and the Bavarian Radio Orchestra with conductors Christian Thielemann, Zubin Mehta, and Mariss Jansons, and soloists Diana Damrau, Plácido Domingo and Lang Lang.