Prince William (William Arthur Philip Louis Mountbatten-Windsor; born 21 June 1982) is the elder son of The Prince of Wales and the late Diana, Princess of Wales. He is second in the line of succession to the British throne and thrones of each of the other Commonwealth Realms. As the son of The Prince of Wales and grandson of Queen Elizabeth II, Prince William is a member of the British Royal Family. He has recently graduated as an army officer at the Royal Military Academy Sandhurst and is due to enter the Blues and Royals regiment of the Household Cavalry of the British Army like his younger brother Prince Harry. His official name as an army officer is Second Lieutenant William Wales. He is 6ft 3in (1.90m) tall.