Pakistan, Sept. 11 -- The Duchess of Edinburgh joined Zara Tindall for a rare royal appearance at the Cornbury House Horse Trials. Sophie and Zara attended the equestrian event in Oxfordshire on Friday. The pair appeared together during the third day of the competition at Cornbury Park. They chatted while watching riders compete throughout the event. Their joint appearance drew attention because royal family members rarely attend such events together.

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Sophie also took part in the event's prize-giving ceremony during her visit. The Duchess presented an award to one of the day's winners. Her participation added a royal presence to the popular equestrian competition. Meanwhile, Sophi...