Alexander Patrick Gregers Richard Windsor, Earl of Ulster is a member of the British Royal Family and the only son of Prince Richard, Duke of Gloucester, and Birgitte, Duchess of Gloucester. He is the heir apparent to the Duke of Gloucester and is known by his courtesy title, the Earl of Ulster. He is also sometimes referred to as Alex Ulster.^[1]

Alexander Windsor was born at St Mary's Hospital, London.^{[citation needed]} He is the only son of Prince Richard, Duke of Gloucester and Birgitte, Duchess of Gloucester.^[2] As of February 2025 he is 33rd in the line of succession to the British throne.^{[citation needed]}

Windsor attended Eton College and later graduated with a degree in War Studies from King’s College London in 1996.^{[citation needed]} He subsequently trained at the Royal Military Academy Sandhurst.^{[citation needed]}

Ulster was commissioned in the King's Royal Hussars on 10 April 1998 as a subaltern (second lieutenant) with seniority from 14 April 1995; he was given the service number 548299. He was promoted to lieutenant on 10 April 1998 with seniority from 14 April 1997,^[3] and to the rank of captain on 16 October 2000.^[4] He saw active service in Northern Ireland, Kosovo in 2002, as well as Iraq. On 14 January 2003, he transferred from a Short Service Commission to an Intermediate Regular Commission.^[5] On 28 April 2008, he was appointed to the Reserve of Officers, signalling his retirement from the British Army with the rank of acting major.^[6]

Since leaving the Army, he has worked in non-governmental organisation roles, and is a director of the Transnational Crisis Project.^[7]

On 22 June 2002, the Earl of Ulster married Claire Booth, a physician, at the Queen's Chapel, St. James's Palace.^{[citation needed]} Lady Ulster is a professor of Gene Therapy and Paediatric Immunology at University College London's Great Ormond Street Institute of Child Health.^[8] The couple has two children:

• Xan Richard Anders Windsor, Lord Culloden (born 12 March 2007).^[9]
• Lady Cosima Rose Alexandra Windsor (born 20 May 2010).^[10]

• 24 October 1974 – 10 June 1974: Lord Culloden
• 10 June 1974 – 10 April 1998: Earl of Ulster
• 10 April 1998 - 16 October 2000: Lieutenant Earl of Ulster
• 16 October 2000 - 28 April 2008: Captain Earl of Ulster
• 28 April 2008 - Present: Major Earl of Ulster

Ribbons of Major Earl of Ulster

Country	Date	Appointment	Ribbon	Post-nominal letters	Other
United Kingdom	6 February 1977	Queen Elizabeth II Silver Jubilee Medal			[12]
	6 February 2002	Queen Elizabeth II Golden Jubilee Medal			[12][13]
	6 February 2012	Queen Elizabeth II Diamond Jubilee Medal			[12][14]
	6 February 2022	Queen Elizabeth II Platinum Jubilee Medal			[12][15]
	6 May 2023	King Charles III Coronation Medal			[12][16]
		General Service Medal			[12]
		Iraq Medal			[12]
NATO		NATO Kosovo Medal			[12][17]