- Older sister of Daniel Day-Lewis.
- Daughter of Cecil Day Lewis (aka Cecil Day-Lewis), poet laureate of England, UK (1968-1972), and British actress Jill Balcon.
- Is a food columnist with the UK's "Daily Telegraph" newspaper
- Sister-in-law of actress Rebecca Miller.
- Granddaughter of Michael Balcon.
- Aunt of Gabriel-Kane Day Lewis.
- Her father was of Northern Irish and English descent. Her mother was from a Jewish family that immigrated to the United Kingdom from Latvia and Poland.
- Lifelong close friend of Jennifer Caron Hall.
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