From his first day at school to his spectacular wedding to Kate – Williams life in pictures as he turns 40

Prince William marks his 40th birthday on Tuesday and to celebrate, OK! is taking a look back at the moments that have defined his life so far.

The future King has married the love of his life, Kate Middleton, and welcomed three children – Prince George, eight, Princess Charlotte, seven, and Prince Louis, four – with her.

But what other moments have shaped the life of the Duke of Cambridge? Join us as we take a trip down memory lane…

Prince William’s ‘regret’ over his last ever conversation with his mother Princess Diana