Prince William and his wife Kate will greet Qatar's emir, Sheikh Tamim bin Hamad Al Thani, and his wife on Tuesday as they begin a two-day state visit to Britain. The visit marks the return of Kate to formal welcoming duties after she missed the Japanese emperor and his wife in June while she was undergoing preventative chemotherapy for cancer.

The Princess of Wales helped kick off the emir of Qatar’s trip to Britain on Tuesday as the U.K. government enlists one of the most popular royals to ensure the success of a state visit by the leader of a key ally,