HM The Queen joined Francesca Simon and the other judges of the BBC 500 Words competition at Windsor Castle for a very special event. The winners of the writing competition were revealed in a special edition of The One Show broadcast on 7th March, which you can watch here.
Here is Francesca with fellow judges Sir Lenny Henry, Malorie Blackman and HM The Queen.
During the celebrations Francesca met Peyton Kershaw from Goole near Hull who is a big fan of Horrid Henry. One of the finalists this year, Peyton Kershaw was in the top 50 last year and so met many of the judges at Buckingham Palace. You can read more here.
Find out more about the event on the BBC here.