Princess Helen of Waldeck and Pyrmont (Helen Frederica Augusta; 17 February 1861 – 1 September 1922), later Duchess of Albany, was a member of the British royal family by marriage. She was the fifth daughter and child of George Victor, Prince of Waldeck and Pyrmont, and his first wife, Princess Helena of Nassau
On 27 April 1882, Leopold and Helen married in St George's Chapel, Windsor Castle. After their wedding, Leopold and Helen resided at Claremont House. The couple had a brief, but happy marriage, ending in the hemophiliac Leopold's death from a fall in Cannes, France, in March 1884. At the time of Leopold's death, Helen was pregnant with their second child.
The couple had two children:
Princess Alice of Albany (1883–1981), later Countess of Athlone
Prince Charles Edward, Duke of Albany (1884–1954), later Duke of Saxe-Coburg and Gotha