Almost 40 years ago, more than 750 million people tuned in to watch Prince Charles marry Princess Diana. The ceremony at St Paul's Cathedral was one of the most viewed events in British history with 3,500 guests also packed into the cathedral to watch the couple tie the knot.
With all eyes on them, it's no surprise that the pair, who had only previously met a handful of times, may have been feeling a little nervous.
And it appears those nerves might have slightly got the better of both of them when it came to the wedding vows - as they both made mistakes.
Charles said his vows first and instead of reciting "my worldly goods" he actually said "thy worldly goods". Meanwhile, Diana muddled Charles' names - and ended up calling him by the wrong
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