Lady Sarah Frances Elizabeth Armstrong-Jones (known since her marriage as Lady Sarah Chatto) (born May 1, 1964) is the daughter of Princess Margaret of the United Kingdom and Antony Armstrong-Jones, 1st Earl of Snowdon. She is married to Daniel Chatto, and has two children, Samuel, born in 1996, and Arthur, born in 1999.

She is a professional painter. She attended the Camberwell School of Art and Middlesex Polytechnic.

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