sˈaɪks twˈɪn sˈɪstɚ lˈuːsi, hˌuː mˈuːvd tə nˈuː jˈɔːɹk ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti sˈɪks, bɪkˌeɪm fˈæʃən dᵻɹˈɛktɚɹ ʌv mɚɹˈiː klˈɛɹ, ænd lˈeɪɾɚɹ ɐ dɪzˈaɪnɚɹ ʌv tʃˈɪldɹənz klˈoʊðz.
Sykes' twin sister Lucy, who moved to New York in 1996, became fashion director of Marie Claire, and later a designer of children's clothes.