The Duchess of Cambridge is still not fully recovered from the acute morning sickness that has blighted her third pregnancy but found herself playing the role of Dancing Queen.
Kate, 35, was twirled around Platform 1 at Paddington station in London after making a surprise appearance alongside the Duke of Cambridge, Prince Harry and cast members from the new Paddington 2 movie at an event involving children from the charities they support.
She and an actor inside a Paddington costume danced to the sound of calypso band D-Lime, who play on the soundtrack of the first and second Paddington films.
It was Kate's second public appearance since Kensington Palace officially announced on September 4 that she was pregnant with her third child and suffering from the severe morning sickness hyperemesis gravidarum.
She has previously pulled out of engagements because of the HG, which can cause vomiting up to 60 times a day but decided to join her husband and brother-in-law as her condition has improved.
'She's feeling much better,' William said. An aide added: 'The Duchess is feeling much better but she has still not fully recovered.'
The three royals joined actor Hugh Bonneville and other members of the cast of Paddington 2 at the station, where they met 130 children from around a dozen of the 30 organizations supported by their royal charities forum.