Kate Middleton met Prince William at university in the early 2000s.
The pair were friends, then started dating. They graduated in 2005.
They got married in 2011, and went on to have three children together.
They have shared their experience of raising children with the country: here are some of their best quotes about parenthood!
Prince George was born in 2013. In New Zealand the following year, William joked: 'I hope that George doesn't keep you up. He has been known to be particularly vocal at 3 a.m. … I swear I heard him doing the haka this morning.'
The couple had daughter Charlotte in 2015.
Kate once said :'We hope to encourage George and Charlotte to speak about their feelings, and to give them the tools and sensitivity to be supportive peers to their friends as they get older.'
'We know there is no shame in a young child struggling with their emotions or suffering from a mental illness.'
Speaking about parenthood, William said: ‘It’s been quite a change for me personally. I’m very lucky in the support I have from Catherine, she’s an amazing mother and a fantastic wife’
'I’ve struggled at times. The alteration from being a single, independent man to going into marriage and then having children is life-changing'.
Prince William said about his son: '[George is] a right little rascal sometimes. He keeps me on my toes, but he's a sweet boy,'
When visiting a primary school, Kate said she was teaching her kids the ‘importance of qualities like kindness, respect, and honesty’.
She added: ‘In my view it is just as important as excelling at maths or sport’.
During a speech in 2017, she said: ‘Personally, becoming a mother has been such a rewarding and wonderful experience’.
'However, at times it has also been a huge challenge. Even for me, who has support at home that most mothers do not'.'
The couple welcomed their second son and third child, Prince Louis in 2018.
In the run-up to his birth, Prince William said: 'Our third child is due in April, I’m getting as much sleep as I can'.
‘Two is fine — I don’t know how I’m going to cope with three. I’m going to be permanently tired.’
In 2019, Kate said she ‘can’t believe' how quickly her eldest child is growing.
In 2019, Prince William revealed that Prince George is 'obsessed' with tractors.
Princess Kate has said that she and her children enjoy cooking together.
She told Mary Berry that they used her pizza dough recipe: ‘They loved it. Absolutely loved it.’
Kate also revealed to Berry that she likes to make her children's birthday cakes.
She said: ‘It’s become a bit of a tradition that I stay up until midnight with ridiculous amounts of cake mix and icing, and I make far too much. But I love it.’
On the ‘Happy Mum, Happy Baby’ podcast, Kate said someone had asked her recently what she wants her kids to remember from their childhood. She said: ‘And I thought that was a really good question, because actually if you really think about that, is it that I’m sitting down trying to do their math and spelling homework over the weekend?’
‘Or is it the fact that we’ve gone out and lit a bonfire and sat around trying to cook sausages that hasn’t worked because it’s too wet? That’s what I would want them to remember, those moments with me as a mother, but also the family going to the beach, getting soaking wet, filling our boots full of water, those are what I would want them to remember. Not a stressful household where you’re trying to do everything and not really succeeding at one thing.’