Maha Vajiralongkorn (born 28 July 1952) is the King of Thailand since October 13, 2016. He is the only son of former King Bhumibol Adulyadej and Queen Sirikit. In 1972, the king gave him the title "His Royal Highness Crown Prince Maha Vajiralongkorn" and the title made him the third Crown Prince of Thailand and heir apparent to the throne. Vajiralongkorn was also a marshal in the Thai military.