Happy Birthday, Princess Diana: 50 Rare Images of an Icon

A Not So Happy Affair
The royal couple appear at an official welcoming ceremony in Toronto in 1991. The prince's continued and oftentimes indiscreet romance with Camilla Parker-Bowles, a woman he had dated in the early 1970s, worsened his already tumultuous marriage to Diana. Parker-Bowles was also married at the time, and her husband sought a divorce after Prince Charles publicly admitted to the extramarital affair.

• Why Princess Diana Mattered