Prince Harry, son of King Charles, is celebrating his 40th birthday today (Sunday, 15 September), with his birthday marking a decade of significant changes in his life. No longer a working member of the Royal family, Harry now resides in the United States with his wife Meghan Markle and their children, Prince Archie and Princess Lilibet. His birthday celebrations are reported to include a weekend away with close friends and quality time with his family of four in their Montecito, California home.