Prince Harry has already stopped drinking out of respect for his pregnant wife, but royal insiders are claiming caffeine and cigarettes are off the table too.
The Duke of Sussex is reported to have given up drinking out of sympathy for Markle, who is pregnant with the couple's first child.
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On top of that the Duchess convinced him to give up cigarettes in March 2018, and finally caffeine towards the end of the year, the Daily Mail reports.
Harry has also taken up yoga and exercise at Chelsea's private members health club KX. It's been reported the 34-year-old is trying to "get his soldier's body back".
Insiders in the royal family say it's definitely been noticed.
"All she did was show him there's another way to live and he's become a huge fan," a source told the Daily Mail.
"He eats well, doesn't poison his body, exercises, does a bit of yoga and is a lot happier."
The paper said getting Prince Harry to give up drinking is no mean feat, considering his partying ways when he was younger.
In 2012 photos surfaced of the prince completely naked, reportedly after a game of strip billiards. In 2011 he was caught on camera jumping into a pool fully clothed after drinking in Hvar, Croatia.