Prince Charles, 73, is the heir to the British throne. He was joined at the ceremony of the State Opening of Parliament by Prince William. Queen Elizabeth, 96, has overseen the ceremony for more than 60 years. She was unable to attend for just the third time during her reign due to a reported decrease in mobility. There was confusion as to whether or not Charles would either sit in the ceremonial throne in the Chamber of the House of Lords or if he would stand near it.