Prince William makes a surprise appearance on BBC’s ‘The Graham Norton Show’ alongside Hannah Waddingham, Robert Irwin and Cate Blanchett to promote his Earthshot Prize environmental initiative. The Prince of Wales gets personal, sharing an inside look into his family’s private life: the future king loves Christopher Nolan films, while his children Prince George and Princess Charlotte are ‘obsessed’ with ‘The Traitors.’ Royal expert Katie Nicholl breaks down the candid moment for ET.

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