I'd like to ask what foreign royals attended the wedding of Princess Anne in 1973?
I know about Queen Beatrix and Prince Claus, King Constantine II and Queen Anne-Marie, Crown Prince Harald (future Harald V) and Princess Sonja, Prince Juan Carlos (future Juan Carlos I) and Princess Sofia.
That's not exactly news, I know. :-)
Princess Grace was there. She caught a lot of flak for wearing "winter white" and upstaging the bride.
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I declare before you all that my whole life, whether it be long or short, shall be devoted to your service and the service of our great imperial family to which we all belong. HRH Princess Elizabeth, Cape Town, 21st April 1947
Technically, it was "winter white." But people don't seem to follow that rule anymore. I have seen white/whitish clothing at lots of royal weddings. (I wouldn't do it... but I think people don't follow "rules" so much, or maybe they aren't taught the "rules".)
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I declare before you all that my whole life, whether it be long or short, shall be devoted to your service and the service of our great imperial family to which we all belong. HRH Princess Elizabeth, Cape Town, 21st April 1947