Dancing Queen: Kate shows off moves in dance with Paddington Bear

It's not what you expect from a pregnant Duchess, but Kate has taken a spin with Paddington Bear as she returned to royal duties.

The Duchess of Cambridge had an impromptu dance with the cartoon bear after making an unexpected appearance at Paddington station.

Crowds had expected to see Prince William and Prince Harry turn up as part of an event for some of the children's charities they support, but Kate stole the show when she turned up unannounced.

Paddington Bear at first appeared to ask Prince Harry if he wanted to dance, but when he said no, Kate took the bear's hand and started twirling and shimmying away on the platform.

Kate, who is pregnant with her third child, is still understood to be suffering from hyperemesis gravidarum - a severe form of morning sickness

Still in character, the actor inside the bear costume, said: "She's a right good mover, and I think she could win Strictly Come Dancing - if she was in it."

The dance routine happened as the royal trio joined stars of the new Paddington II movie, including Hugh Bonneville, to wave off a group of children who were taking a day trip on a steam train from Paddington station.

The children were selected by members of the royal trio's Charities Forum - with many going through difficult times in their lives.

One of the children managed to get Prince William to reveal that one of Prince George's favourite movies is the Lion King.

Talking to the little boy William said, "He quite likes the Lion King, he's watched that few times, what else does he like, he quite likes Octonauts, have you seen that?

"He's also watched some Lego Movies as well, he's watched a lot of things like that.

"Trying to keep him off television is quite hard work. Not too much TV!"