Felix O. Adlon Director, Writer Percy Adlon Director, Screenwriter Johannes Silberschneider Gustav Mahler Actor Karl Markovics Sigmund Freud Actor Eva Mattes Anna Moll Actor Lena Stolze Justine Mahler-Rose Actor Karl Fischer Carl Moll Actor Barbara Romaner Alma Mahler Actor Friedrich Mücke Walter Gropius Actor Nina Berten Anna von Mildenburg Actor Mathias Franz Stein Alexander von Zemlinsky Actor Eleonore Adlon Producer Burkhard W.R. Ernst Producer Konstantin Seitz Producer Gustav Mahler Original Music Benedict Neuenfels Cinematographer Jochen Kunstler Film Editing Nicole Schmied Casting Bernt Amadeus Capra Production Design Veronika Merlin Art Director Caterina Czepek Costume Design