Prince William warned his brother not to propose to Meghan Markle for fear their relationship was moving “too fast”, according to Harry’s bombshell book.
The now Duke and Duchess of Sussex met in 2016 when they were set up by mutual friends on a blind date and immediately hit it off.
After a year together, Harry was ready to get down on one knee which, according to Spare, did not go down well with his elder brother.
He is said to have been “concerned” and told his younger brother he was taking things “a bit too far”.
Harry wrote: “It's too fast, he'd told me. Too soon. In fact, he'd actually been pretty discouraging about my even dating Meg.
“One day, sitting together in his garden, he'd predicted a host of difficulties I could expect if I hooked up with an 'American actress', a phrase he always managed to make sound like a 'convicted felon',” according to Page Six.
Ahead of the wedding held in 2018 in Windsor, Meghan infamously fell out with William’s wife Kate when she told her she must have "baby brain".
The comment wasn't well-received and the foursome later met in a bid to try and move past the incident - but this led to a row between Prince William and Meghan, the book claims.
Kate gave birth to her third child, Prince Louis, just a month before Meghan and Harry's big day and was heavily pregnant at the time of the fitting.
During all three of her pregnancies, she suffered from hyperemesis gravidarum - excessive nausea and vomiting caused by a hormone imbalance.
In the book Spare , Harry reportedly recounts how Kate was upset - but Meghan apologised and explained that is how she speaks to her friends.
Meghan was left upset by the incident, Harry said, especially as she was reportedly warned she wasn't close enough to Kate to make a remark about her hormones.
Kensington Palace and Buckingham Palace have so-far declined to comment on the leaked claims from Harry's book, which emerged five days before the explosive tell-all autobiography Spare was due to be published.
Yesterday it emerged Harry had suffered a frostbitten penis during Prince William and Kate Middleton 's wedding.
In one section, the prince details his painful experience with frostbite — which he said affected his ears, cheeks and 'todger' — following a 200-mile Arctic charity walk.
The prince's Walking with the Wounded expedition saw him embark on a brutal journey to the North Pole alongside four ex-servicemen who were injured in Afghanistan.
The team raised £2million for the Walking with the Wounded charity.