The Duke of Cambridge is a title held by Prince William, the elder son of Prince Charles and the late Princess Diana. He was born on June 21, 1982, and became the Duke in 2011 after his marriage to Catherine, Duchess of Cambridge. The couple has three children: Prince George, Princess Charlotte, and Prince Louis. As a member of the British royal family, the Duke of Cambridge undertakes various official duties and charitable work. He is involved in numerous organizations focusing on mental health, conservation, and support for veterans. His role often includes representing the royal family at public events and engagements.