Prince William has revealed that last year – the year his wife Catherine, Princess of Wales and his father King Charles III were diagnosed with cancer – was the "hardest year" of his life.

The Prince of Wales, 43, is set to appear in an upcoming episode of Eugene Levy's travel docuseries The Reluctant Traveller.

In a new trailer for the soon-to-be-released Levy can be seen touring London on one of the city's famous double decker buses before visiting the future King of England at Windsor Castle.

Watch the video above.

The Schitts Creek star first meets Prince William in the gardens of Windsor Castle where the prince rides atop what appears to be a motorised scooter.

"Nice to see you," Prince William says to a gleeful Levy.

The clip then cuts to a scene of Levy and

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