Prince Louis looks so grown up in new picture with mum Kate Middleton and grandpa Prince Charles

Prince Louis has certainly grown since the last time we saw him at his Christening, as a new picture with mum Kate Middleton and grandpa Prince Charles is unveiled.

We haven't seen Kate and Wills' youngest child since he was pictured at his Christening in July, as he missed Princess Eugenie's wedding in October, but now we finally got a glimpse of how much he's grown.

The new picture shows little Louis, who is now six-months-old, in his mother's arms while his grandfather Prince Charles lovingly plays with him.

The adorable moment was captured for the BBC documentary Prince, Son and Heir: Charles at 70, and it was filmed back in September in the garden of Clarence House.

At the time little Louis was five-months-old, and we can't help but notice how much he looks like his big brother George when he was the same age!

Prince Charles' close bond with his grandchildren was revealed by his son William, who also says he wishes he would spend more time with the little ones in the family.

William said: 'He’s the fittest man I know, but equally I want him to be fit until he’s 95.

'Having more time with him at home would be lovely, and being able to you know play around with the grandchildren. Because when he’s there, he’s brilliant. But we need him there as much as possible.'

And it's not just his own grandchildren who Charles has a good relationship with - he's also very close with his wife Camilla's grandchildren. The two have nine grandchildren and step-grandchildren between them, and they're about to welcome another one when Harry and Meghan have their baby.

The Duchess of Cornwall said: 'He will get down on his knees and crawl about with them for hours, you know making funny noises and laughing and my grandchildren adore him, absolutely adore him. He reads Harry Potter and he can do all the different voices and I think children really appreciate that.'

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