Princess Diana was just 19 years old when she got engaged to King Charles. When the pair married on July 29, 1981, Diana had just turned 20; at the time, Charles was 32. As a result, the couple learned to navigate their age gap, and according to Diana, she sometimes felt like a child within the Royal Family.
In a letter written to former classmate Katherine Hanbury in September 1981, Princess Diana discussed a myriad of topics, including her recent honeymoon with Charles.