Sophia, Lady Burdett (1775–1844) was an English heiress and political hostess.
The third daughter of the wealthy banker Thomas Coutts, she and her sisters were known as the Three Graces.
Her father married a second wife the Irish actress Harriet Mellon, significantly reducing her inheritance.
Her husband was a leading Radical throughout most of his career, notably during the Regency era.
A rising artist he later became Britain's leading portrait painter and President of the Royal Academy.