The Prince of Wales will make a passionate plea for urgent action to save our oceans "while we still have the chance", after joining forces with Sir David Attenborough to highlight the issue.

Prince William appears alongside the legendary naturalist in a short film to promote his new Oceans movie.

He is seen joking with Sir David as the 99-year-old wildlife presenter demonstrates putting on one of his first diving helmets, with William telling him, "Don't put it on, you won't get it off David!"

© Ryan Jenkinson / Kensington Palace William sat down with Sir David to discuss his new documentary

The clip has been shared ahead of the heir to the throne's trip to Monaco on June 8, where he will deliver a landmark speech urging government and business leaders to take action to protec

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