Even though their marriage officially lasted 15 years, King (then-Prince) Charles and Princess Diana's relationship began to deteriorate quickly, which tensions between the pair reportedly running high long before they formally separated in 1992.
Still, according to Diana’s closest aide at the time—her former private secretary Patrick Jephson—those closest to the late princess thought there was still hope for the estranged couple right up until her bombshell Panorama interview.
