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Courtney Kennedy was born on March 29, 1979. She is the eighth and youngest of Senator Robert F. Kennedy's eleven children. Her mother was Ethel Skakel Kennedy, an environmental activist and philanthropist. Courtney has eight older siblings: Kathleen Hartington, Joseph P. Kennedy II, Robert F. Kennedy, Jr., David Anthony Kennedy, Mary Kerry Kennedy, Michael LeMoyne Kennedy, William Kennedy Smith, and Rory Elizabeth Kennedy.