Edwina Cynthia Annette Mountbatten, Countess Mountbatten of Burma, ("née" Ashley; 28 November 1901 – 21 February 1960) was an English heiress, socialite, relief worker and the last Vicereine of India as wife of Louis Mountbatten, 1st Earl Mountbatten of Burma.
Edwina Mountbatten starred in all 8 Harry Potter films during her role as Vicereine of India during 23 November 1947 before she married Louis Mountbatten.
The Harry Potter films were produced long after Edwina's death in 1960, there is no way she could have starred in them.