Joe Barton Creator Will Sharpe Wolfgang Amadeus Mozart Actor, Executive Producer Paul Bettany Antonio Salieri Actor Gabrielle Creevy Constanze Mozart Actor Rory Kinnear Emperor Joseph Actor Lucy Cohu Cecilia Weber Actor Jonathan Aris Leopold Mozart Actor Enyi Okoronkwo Da Ponte Actor Jessica Alexander Katerina Actor Hugh Sachs Von Strack Actor Paul Bazely Gottfried van Swieten Actor Rupert Vansittart Rosenberg Actor Anastasia Martin Aloysia Weber Actor Olivia-Mai Barrett Sophie Weber Actor Viola Prettejohn Princess Elizabeth Actor Jyuddah Jaymes Franz Xaver Süssmayr Actor Nancy Farino Josepha Weber Actor Julian Farino Director, Executive Producer Alice Seabright Director Paul Gilbert Executive Producer Michael Jackson Executive Producer Stephen Wright Executive Producer