Prince William, Prince Andrew, Prince Edward and his wife Sophie all reportedly made the one-hour flight to be by Elizabeth's side.

96-year-old Queen Elizabeth II will remain under doctors' care as concerns over her health continue to grow, this according to a new statement from Buckingham Palace.

"Following further evaluation this morning, the Queen's doctors are concerned for Her Majesty's health and have recommended she remain under medical supervision. The Queen remains comfortable and at Balmoral," the palace statement, released Thursday, said.