Oona Castilla Chaplin (born 4 June 1986) is a British-Spanish actress. She is the granddaughter of Charlie Chaplin and the great-granddaughter of American playwright Eugene O'Neill.
| Net Worth | $500,000 |
| Date Of Birth | May 14, 1925 |
| Place Of Birth | Warwick Parish, Bermuda |
| Occupation | Actress, flamenco dancer, ballerina |
| Profession | Actress, Miscellaneous Crew |
| Education | Royal Academy of Dramatic Art |
| Nationality | Spanish |
| Parents | Patricio Castilla, Geraldine Chaplin, Patricio Castilla |
| Siblings | Eugene O'Neill, Oona O'Neill, Charlie ChaplinOona O'NeillEugene O'Neill, Charlie Chaplin Oona O'Neill Eugene O'Neill |
| Nicknames | Oona Castilla Chaplin, Oona Chaplin, Chaplin, Oona Castilla |
| Star Sign | Taurus |
| # | Fact |
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| 1 | After her husband died, in 1977, she would often cheer herself up by watching episodes of Fawlty Towers (1975). |
| 2 | Is portrayed by Moira Kelly in Chaplin (1992) |
| 3 | Lifelong friend of Gloria Vanderbilt (the designer) and Carol Grace (who later married actor Walter Matthau). |
| 4 | Voluntarily renounced her American citizenship right after Charles Chaplin was barred from the US (1953). |
| 5 | Granddaughter of James O'Neill. |
| 6 | Half-brother, Eugene Jr., born May 1910. Brother, Shane O'Neill, born October 1919. |
| 7 | Buried beside husband Charles Chaplin at a cemetery in Vevey, Switzerland. |
| 8 | Grandmother of James Thierrée, Carmen Chaplin, Dolores Chaplin, Kiera Chaplin and Oona Chaplin. |
| 9 | Daughter of playwright Eugene O'Neill and the socialite Agnes Boulton. |
| 10 | Mother, with Charles Chaplin, of Geraldine Chaplin, Michael Chaplin, Josephine Chaplin, Victoria Chaplin, Eugene Chaplin, Jane Chaplin, Christopher Chaplin, and Annette-Emilie (born December 3, 1959). |