Catherine, the Duchess of Cambridge, and her daughter, Princess Charlotte of Cambridge, who was christened at Sandringham, are seen in this handout photo released on July 9, 2015. [Photo/Agencies]

An April 2016 handout picture released by the Duke and Duchess of Cambridge and made available by Kensington Palace on May 1 2016 shows Princess Charlotte taken by the Duchess at the garden of Anmer Hall in Norfolk. Princess Charlotte will celebrate her first birthday, on May 2, 2016. [Photo/IC]