Lady Frances Finch was born at Grosvenor Square, London, on 9 February 1761, the daughter of Heanage Finch, 3rd Earl of Aylesford, and Charlotte, daughter of Charles Seymour, Duke of Somerset. At the age of twenty-one, Lady Frances married George Legge, Lord Lewisham, who subsequently became the 3rd Earl of Dartmouth. She died in November 1838 at Blackheath. The background in this portrait may allude to Packington Hall, the Aylesford seat in Warwickshire, which was set in a park landscaped by Capability Brown (1715–1783).