| Attore | Ruolo |
|---|---|
| John Malkovich | Gustav Klimt |
| Stephen Dillane | Segretario |
| Veronica Ferres | Emilie Flöge |
| Saffron Burrows | Lea De Castro |
| Paul Hilton | Octave Herzog |
| Sandra Ceccarelli | Serena Lederer |
| Karl Fischer | August Lederer |
| Irina Wanka | Berta Zuckerkandl |
| Antje Charlotte Sieglin | Vally |
| Nikolai Kinski | Egon Schiele |
| Joachim Bissmeier | Hugo Moritz |
| Peter Appiano | Carl Moll |
| Mark Zak | Hevesi |
| Gunther Gillian | Georges Méliès |
| Dennis Petkovic | Adolf Loos |
| Nicole Beutler | Inglese |
| Alexandra Hilverth | Madame |
| Miriam Heard | Infermiera |
| Rose-Lise Bonin | Sylvia |
| Julie Bräuning | Lissie |
| Ariella Hirshfeld | Kati |
| Miguel Herz-Kestranek | Dottor Stein |
| Alexander Strobele | Hermann Bahr |
| Erwin Leder | Infermiere |
| Aglaia Szyszkowitz | Mizzi |
| Martin Brambach | Thomas |
| Georg Friedrich | Cameriere |
| Marion Mitterhammer | Hermine Klimt |
| Annemarie Düringer | Madre di Klimt |
