In his memoir, "Spare," Prince Harry describes with sadness how he was informed of the death of his mother, Princess Diana, and what happened afterwards.

Speaking to Good Morning America's Michael Strahan, the Duke of Sussex described the aftermath of Princess Diana's accident this way: "I think they knew what they were doing. I don't think they knew what to do, and I don't know if any other family would have done a better job."

"I wish I had had some kind of therapy or at least the ability or opportunity to talk more about losing my mother and celebrating her life. But who knows if I could have said yes to that when I was 12 years old."

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For the co-founder of Archewell, therapy would have been very helpful to him at the time to ease his sense of drifting after the death of his mother at an early age.

"If you had asked me a question like, 'How would your life have been different if you had been in therapy at that time,' I probably would have cut back on the amount of drugs," Harry says. [I would probably have been drinking less and going to parties less. I'm not saying I didn't go to parties and do those things, but I probably would have. For me, it was either find the emotion or numb the emotion.

Prince Harry served in the British Army for 10 years, including two tours in Afghanistan.

As an adult, he has publicly stated how seeing a therapist has helped him. More recently, she has been an outspoken advocate for mental wellbeing, including her role as Chief Impact Officer of Better Up, a "mental fitness" startup.

"The moment I started therapy, I woke up. I was going through life thinking there was only one way to live, and therapy burst that bubble," Harry said in a chat with Better Up CEO Alexi Robichaux in October (via The Telegraph). [And when I found my way into coaching, the next bubble burst and all of a sudden I realized that I had a vision and I knew exactly what I was worth. I regained a confidence I never thought I had."

Spare is available now and can be purchased at major bookstores.