The 34-year-old gave her last televised chat in November 2010, on the day her engagement to Prince William was announced, but on Monday, E! News reported Catherine would be filmed for a documentary to celebrate Queen Elizabeth II's 90th birthday. The mother-of-two will join a host of elite members of the Royal Family, including her husband, his father, the Prince of Wales, and his wife the Duchess of Cornwall in paying tribute to the British monarch ahead of her latest age milestone. Sources tell the outlet the programme will air in May (16), weeks after the Queen's big day on 21 April. "It's a remarkable story of an extraordinary life which in so many ways reflects the changing face of the nation," said Jo Clinton-Davis, ITV's controller of factual television, who co-commissioned the film. "As she reaches her 90th birthday, this film aims to offer a fresh insight into our monarch's life and work."