British Vogue details the Duchess of Cambridge 's style secrets in its February issue . The magazine also reveals that Kate is planning to wear a black dress for her upcoming visit with Prince William and his wife Catherine, who are expected to arrive at Buckingham Palace on March 29. designers such as Roland Mouret say it 's not so cut and dried . The average number of teeth she exposes while smiling is 8.6 , according to British Vogue .
British Vogue details the Duchess of Cambridge 's style secrets in its February issue . The magazine also reveals that Kate is planning to wear a black dress for her upcoming visit with Prince William and his wife Catherine, who are expected to arrive at Buckingham Palace on March 29. The average number of teeth she exposes while smiling is 8.6 , according to British Vogue .