His Royal Highness Crown Prince Maha Vajiralongkorn was born on July 28, 1952, in the Ambara Villa of the Royal Dusit Palace in Bangkok, Thailand. He is the second of four children, and is the only son of Their Majesties King Bhumibol Adulyadej and Queen Sirikit. His Majesty the King conferred him with the title of "Somdech Phra Boroma Orasadhiraj Chao Fah Maha Vajiralongkorn Sayam Makutrajakuman" on December 28, 1972, making him the Crown Prince and heir to the throne.