William, Duke of Cambridge, is a member of the British royal family, born on June 21, 1982. He is the elder son of Charles, Prince of Wales and Diana, Princess of Wales. William is second in line to the British throne, following his father. He married Catherine, Duchess of Cambridge in 2011, and they have three children: Prince George, Princess Charlotte, and Prince Louis. Educated at Eton College and St Andrews University, William served in the Royal Air Force as a search and rescue pilot. He is known for his charitable work, particularly in mental health and conservation, and is involved in various organizations, including The Royal Foundation.