Princess Diana laughing hysterically at Prince Charles because he had to wear a rather odd-looking hard hat during their royal tour of Australia in 1985.
In the funny clip, recorded at Alcoa Aluminium Smelter Project, Charles and Diana are being shown around but it seems the Princess of Wales is having an attack of giggles.Charles has to wear a shiny white hat with "HRH Prince of Wales" written across the front.Although Diana is wearing a matching one with her own royal title, she can't seem to get over how funny her husband looks with the industrial hard hat on his head.Despite her trying to cover her laughter behind a hand, it doesn't take long for Prince Charles to figure out she is laughing at his expense and he jokingly calls her.
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