Named for her great-grandmother, Oona O'Neill Chaplin, who was playwright Eugene O'Neill's daughter and Charlie Chaplin's fourth wife.
Raised in Spain, Switzerland and Cuba; English is her third language, after Spanish and French.
Impersonated her grandfather while playing the character Bottom in a reimagination of A Midsummer Night's Dream at the Edinburgh Fringe Festival in 2003.
Attended the Royal Academy of Dramatic Art with Gemma Arterton.