Prince William is said to have offered his brother an incredible piece of advice after his mental health and booze struggles spiralled.
Prince Harry spoke of his younger, partying days in a 2017 interview when he said he felt "directionless" and turned to alcohol, adding how he came close to a "breakdown".
His mental health had become so poor during his partying days, Prince Harry said he even considered turning his back on royal life years before eventually stepping down from The Firm as a married father-of-two.
Harry described how he "spent many years kicking my heels and I didn’t want to grow up" - saying most of his unhappiness derived from bottling up his grief over the loss of his mother, Princess Diana, in 1997.
However, the now Duke of Sussex, said at the age of 28 his brother William recommended he seek professional help.
Harry said the advice enabled him to dedicate his time to the philanthropic causes he supports to this day.
During the 2017 chat, Harry also went on to claim nobody within the royal family actually wants to be king or queen, reports the Express.
He added that the monarchy are motivated by this sense of duty and their charity interests, explaining: "We are incredibly passionate with our charities and they have been chosen because they are on the path shown to me by our mother. I love charity stuff and meeting people."
Some of the causes championed by the Prince include mental health, conservation and supporting ex-servicemen and women including those who have been severely injured while serving their country.
He said: "We don’t want to be just a bunch of celebrities but instead use our role for good."
The Duke also said he disliked "feeling I live in a goldfish bowl" and has stated that the intense media scrutiny into his family's life was one of the reasons he left the UK.
In 2017 he said: "I am determined to have a relatively normal life and if I am lucky enough to have children they can have one too."
