Oona O'Neill

Oona, Lady Chaplin (née O'Neill) (14 May 1925 – 27 September 1991) was the fourth wife and later widow of British comic and filmmaker Sir Charles "Charlie" Chaplin. She was the daughter of Nobel and Pulitzer Prize-winning playwright Eugene O'Neill and writer Agnes Boulton.
In 1954, she gave up her American citizenship and became a British citizen.