 Michelle WilliamsGail Harris | Gail Harris |
 Mark WahlbergFletcher Chase | Fletcher Chase |
 Christopher PlummerJean Paul Getty | Jean Paul Getty |
 Charlie PlummerJohn Paul Getty III | John Paul Getty III |
 Romain DurisCinquanta | Cinquanta |
 Timothy HuttonOswald Hinge | Oswald Hinge |
 Charlie ShotwellJohn Paul Getty III (Age 7) | John Paul Getty III (Age 7) |
 Andrew BuchanJohn Paul Getty II | John Paul Getty II |
 Marco LeonardiSaverio Mammoliti | Saverio Mammoliti |
 Giuseppe BonifatiGiovanni Iacovoni | Giovanni Iacovoni |
 Nicolas VaporidisIl Tamia 'Chipmunk' | Il Tamia 'Chipmunk' |
 Andrea Piedimonte BodiniCorvo | Corvo |
 Guglielmo FavillaPiccolino | Piccolino |
 Adele TiranteMaria | Maria |
 Stacy MartinNancy | Nancy |
 Maya KellyAileen Getty (Age 6) | Aileen Getty (Age 6) |
 Anna DevlinAileen Getty (Age 15) | Aileen Getty (Age 15) |
| KKit CranstonMark Getty (Age 4) | Mark Getty (Age 4) |
| SStanley TreshanskyMark Getty (Age 13) | Mark Getty (Age 13) |
| GGinevra MiglioreAriadne Getty (Age 2) | Ariadne Getty (Age 2) |
| JJosie SayersAriadne Getty (Age 11) | Ariadne Getty (Age 11) |
 Olivia GrantMillicent | Millicent |
 Charlotte BeckettAnnie | Annie |
 Roy McCrereyAttorney | Attorney |
 Giulio BaseCoroner | Coroner |
| NNicola Di ChioKidnap Van Driver | Kidnap Van Driver |
 Alessandra RocaProstitue #1 | Prostitue #1 |
 Francesca InaudiProstitute #2 | Prostitute #2 |
 Francesco BomenutoRome Hotel Butler | Rome Hotel Butler |
 Ghassan MassoudArab Sheikh | Arab Sheikh |
