Mills made her film debut with an uncredited bit part as a model in Live a Little, Love a Little 1968.
Her father disappeared from her life shortly after her birth, and Vanna used her mother's maiden name as her own until her mother married Herbert White, who raised her.
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Kim caught the acting bug when she starred in the Bad Seed at nine years old.
Upon her move to Los Angeles Mattison wrote her first screenplay titled Fish Without A Bicycle.
She discovered her love for comedy in a summer drama class, when she was cast.