| The trials and triumphs of one of the wealthiest and unhappiest families of the United States, the Gettys. Originally planned to be told over multiple seasons and spanning the twentieth century, the series begins in 1973 with the kidnapping of John Paul Getty III, an heir to the Getty oil fortune, by the Italian mafia in Rome. |
| Name | Character | Episodes |
|---|---|---|
| Harris Dickinson | J. Paul Getty III | 10 |
| Brendan Fraser | James Fletcher Chace | 10 |
| Donald Sutherland | J. Paul Getty Sr. | 10 |
| Hilary Swank | Gail Getty | 10 |
| Anna Chancellor | Penelope | 10 |
| Luca Marinelli | Primo | 10 |
| Michael Esper | J. Paul Getty Jr. | 10 |
| Silas Carson | Khan | 10 |
| Hannah New | Victoria | 7 |
| Charlotte Riley | Robina Lund | 6 |
| Sophie Winkleman | Margot | 6 |
| Niccolò Senni | Fifty | 6 |
| Amanda Drew | Belinda | 6 |
| Sarah Bellini | Jutta | 5 |
| David Bamber | Bela von Block | 5 |
| Jo Stone-Fewings | Dennis | 5 |
| John Schwab | Lang Jefferies | 5 |
| Andrew Havill | Patrick de Laszlo | 4 |
| Verónica Echegui | Luciana | 4 |
| Norbert Leo Butz | Gordon Getty | 3 |
| Donatella Finocchiaro | Regina | 3 |
| Cristiana Dell'Anna | Lucia | 3 |
| Jack Laskey | Dr. Mackenzie | 3 |
| Alessio Praticò | Farmer | 3 |
| David Agranov | Ronald Getty | 3 |
| Bella Dayne | Talitha | 2 |
| Kierston Wareing | Cockney Pauline | 2 |
| Nicola Di Pinto | Luigi | 2 |
| Giovanni Calcagno | Henchman 1 | 2 |
| Lynda Boyd | Jacqueline | 1 |
| Samuel West | Professor Talbot | 1 |
| Rob Brydon | President Nixon | 1 |
| Rob Delaney | Lansing | 1 |
| Lisa Dwan | June | 1 |
| Giulio Beranek | Nicolo | 1 |
| Tim Key | Gavin | 1 |
| Michael Brandon | Walter Annenberg | 1 |
| Thomas Trabacchi | Dottore | 1 |
| Ian Conningham | Head Gardener | 1 |
| Luke de Woolfson | Security Guard | 1 |
| Giulia Elettra Gorietti | Sophia | 1 |
| Patrick Marber | Lord Jefferies | 1 |
| Fabrizio Ferracane | Vet | 1 |
| Christopher Bowen | Board Member | 1 |
| Micah Balfour | Eugene Allen | 1 |
| Antonio De Matteo | Translator | 1 |
| Stefano Ambrogi | Swimmer | 1 |
| Aurora Quattrocchi | Rosaria | 1 |
| Alessandro Fabrizi | Hotel Porter | 1 |