Louisa Jane McDonnell, Countess of Antrim, VA (née Grey; 15 February 1855 – 2 April 1949) was a British noblewoman and courtier.

[1] Lady Antrim was born at St James's Palace, the daughter of Gen. Hon.

She had one brother, Albert Grey, 4th Earl Grey and her three sisters Sybil, Duchess of St Albans (wife of 10th Duke of St Albans), Lady Victoria Dawnay (wife of Lewis Payn Dawnay), and Mary, Countess of Minto.

In 1890, the Countess became a Lady of the Bedchamber to Queen Victoria, serving until the latter's death in January 1901.

[3] She married in the Chapel Royal at St. James's Palace on 1 June 1875 the 6th Earl of Antrim.