Prince William and Kate have sent thank you cards to everyone who wrote to congratulate them after the birth of royal baby, Prince George . In a letter to all the well-wishers who included a return address, the Duke and Duchess of Cambridge said how touched they were that people had taken the trouble to write to them, the Mirror reported.

The cards have a picture of the royal couple with their newborn son outside the Lido Wing of St Mary’s Hospital on the front, and a message that reads: 'The Duke and Duchess of Cambridge were most touched that you took the trouble to write as you did on the occasion of the birth of their son Prince George. Their Royal Highnesses have been overwhelmed by all the wonderful messages they have received and send you their warmest thanks and best wishes.'