<PERSON>'s wedding was the first royal ceremony to be broadcast on TV and attracted 300 international viewers. Her niece, <PERSON>, served as one of her eight bridesmaids. <PERSON> and <PERSON> would go on to have two children, Lady<PERSON> (now <PERSON>) and<PERSON>, the 2nd <PERSON>. After 18 years, <PERSON> and <PERSON>'s volatile marriage ended in divorce in 1978. Related: <PERSON>? The Depressing End to an Unconventional Royal Life