Irene Frances Adza Mountbatten, Marchioness of Carisbrooke (née Denison; 4 July 1890 – 16 July 1956) was the daughter of William Francis Henry Denison, 2nd Earl of Londesborough, and Lady Grace Adelaide (daughter of Francis Fane, 12th Earl of Westmorland).

She married Alexander Mountbatten, 1st Marquess of Carisbrooke, a female-line grandson of Queen Victoria.

[1] She married Alexander, 1st Marquess of Carisbrooke, son of Prince Henry of Battenberg and Princess Beatrice of the United Kingdom, on 19 July 1917 at the Chapel Royal, St. James's Palace, London.

Lady Irene and Alexander, 1st Marquess of Carisbrooke had one child, a daughter: She was invested as a Dame Grand Cross of the Order of the British Empire (GBE) and invested as a Dame of Justice of the Order of St John of Jerusalem (DStJ).

[2] She succeeded Princess Beatrice of the United Kingdom as President of the Frank James Memorial Hospital at East Cowes in 1946, carrying on the role until it was taken over by the National Health Service in 1948.