India, Sept. 8 -- The Princess of Wales joined Prince William in commemorating the third anniversary of Queen Elizabeth II's death with an unannounced appearance at the National Federation of Women's Institutes (WI) in Sunningdale, west of London, reported People.

Although Prince William had been scheduled to attend the engagement, Kate's attendance was not publicised in advance. Royal sources told MailOnline that Kate Middleton was 'keen to join her husband to commemorate and celebrate the life of the late Queen'.

Dressed in an elegant grey check midi dress and diamond stud earrings by Kiki McDonough, Kate paid tribute to the Queen, who had been a dedicated member of the WI for eight decades.

As per another Tatler report, during their...