King Charles III and Queen Camilla are among well-wishers to share a birthday message celebrating Sir David Attenborough turning 100.
The royal couple also shared photographs of Sir David, including one of him with a young Prince Charles and Princess Anne in 1958, in which he is introducing them to Cocky the cockato.
The King and Queen wished him a very happy birthday, adding: “Enjoy your special celebration this evening!”
The veteran broadcaster and environmentalist has said he was “completely overwhelmed” by messages he had received ahead of his big day, which includes a special concert on Friday evening at the Royal Albert Hall in London.