Her maternal grandparents were Charles Bingham, 4th Earl of Lucan, and Lady Cecilia Catherine Gordon-Lennox, a daughter of Charles Gordon-Lennox, 5th Duke of Richmond, and Lady Caroline Paget.

Hamilton married Viscount Althorp on 26 February 1919 at St James's Church, Piccadilly, London.

[1] They had two children: Countess Spencer was appointed a Lady of the Bedchamber to Queen Elizabeth in 1937.

She continued in the role after Elizabeth became Queen Mother in 1952, and remained in post until her death.

[8] Countess Spencer was little known outside court and local circles until, twenty years after her death, Andrew Morton wrote that the Princess of Wales "believes that her grandmother looks after her in the spirit world.