Alexander Windsor, Earl of Ulster
Alexander Patrick Gregers Richard Windsor, Earl of Ulster (born 24 October 1974) is the only son of the Duke and Duchess of Gloucester. As the eldest son and heir of the Duke of Gloucester he is styled Earl of Ulster.
He was married on 22 June 2002 to Dr Claire Booth in the Queen's Chapel, St. James's Palace, London.
Lord Ulster is an officer in the British Army, and has served in the King's Royal Hussars since 1998; he saw active service in Kosovo in 2002. He has been even more rarely in the public eye than his two sisters Davina (b. 1977) and Rose (b. 1980).
The Earl of Ulster is currently 19th in the line of succession. Before the Royal Titles Act of 1917, which limited the size of the Royal Family, as a great-grandson of a Monarch (in this case, George V) in the male line he would have been styled as His Highness Prince Alexander of Gloucester.