United Kingdom, Oct. 20 -- Prince Harry, Duke of Sussex, did not cry over his mother Princess Diana's death for 20 years.

The royal was just 12 when the 36-year-old Princess of Wales died after being fatally injured in a car crash in the Pont de l'Alma tunnel in Paris, France, on August 31, 1997, alongside her 42-year-old partner, film producer Dodi Fayed, and their 41-year-old driver, Henri Paul.

Harry, now 42, suppressed his emotions for two decades and admitted that therapy helped him acknowledge his grief over losing his mother, who also had William, Prince of Wales, now 44, with her ex-husband, the now-77-year-old King Charles.

In an interview with GQ, Harry was asked how grief manifested itself for him, replying: "All of it. I th...