13 January 2012, 09:56 | Updated: 13 January 2012, 09:59
A horse was one of the stars of the show at the royal premiere of Steven Spielberg's new movie War Horse.
The Duke of Duchess of Cambridge were also at the screening in London's Leicester Square on Sunday 8 January 2012.
The film tells the story of a boy and a horse during the First World War. Hertfordshire has played its part in the film, because it's based on the novel by St Albans-born author Michael Morpurgo and some of the actors underwent riding training in Rickmansworth.
The horse Sultan - who plays the part of Joey in the film - was driven down to London from stables near Milton Keynes for the premiere.
Watch the trailer