Princess Diana and King Charles
Generally speaking, everyone knows that the British Royal Family is very traditional in every sense. Whether it be the way they dress, eat, or generally live their lives, they tend to act with caution in most settings. And when the current King of England first married his princess all those years ago, the family thought it was the most appropriate decision for everyone.
People had high hopes for the couple when they got married in 1981, but people soon learned that king Charles had his sights set on someone else for the duration of his marriage to Princess Diana. After their two children, prince William and prince Harry were born, they managed to stay together for a while. But their union officially ended when they separated in 1992.