How Meghan Markle's Healthy Lifestyle Is Changing Prince Harry (Exclusive)

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Royal expert Katie Nicholl tells ET how the 'Suits' star has changed Harry's life for the better.

Meghan Markle is making a huge impact on Prince Harry's lifestyle.

The Suits star is big on fitness and nutrition and it seems as if the 33-year-old royal is picking up on Meghan's healthy habits. Royal expert Katie Nicholl, author of Harry: Life, Loss, and Love, told ET on Thursday that Meghan has had a very positive influence on Harry, and that his friends even poke fun at him for adopting a healthier lifestyle.

"There's a park outside Kensington Palace and Meghan has been seen running a circuit there. She's often in and out of the gym," Nicholl explained. "Meghan is a complete fitness fanatic. She loves to run laps around Kensington gardens, which is just outside Kensington Palace. I'm told that she's a fan of a private members club that does intensive fitness training classes, it's called the Skinny Bitch Collective. She was introduced to it by her friend Millie Makintosh. She loves her yoga, in fact, she starts most mornings with a yoga ritual and that's rubbed off on Prince Harry."

"One of the things I was told by a friend of his for the book is that he's also getting into yoga. He likes to start his day with a green juice now, just like Meghan, and his friends all find this very amusing that he's turned into a bit of a fitness fanatic himself," she added. "You'll often see him visiting the gym and he's given up his beloved Marlboro Lights, or at least he's smoking less and he's drinking less. So Meghan and her green LA lifestyle I think have really rubbed off on the Prince, and for the better."

Not only is the bride-to-be making Harry workout and eat better, she's also making him smile more often and open up emotionally.

"I started charting Prince Harry's life 10 years ago now and there were tags that were attached to him," she explained. "He was a bit of wayward royal, you know, there was a bit of a rebel in him. I would say that Meghan has tamed him. I think Meghan has changed him for the better. I think she's helped get him more in touch with his emotional side and he is without a doubt a happier man with Meghan in his life."

"When I see him on engagements now he's smiling, he's always been enthusiastic. He's always been charming, that is part of Harry's appeal. But he seems so much happier," Nicholl added. "So much more ready to embrace the future and his royal role with someone to share the load with. He seems really to have met his match in Meghan."

Additionally, Nicholl told ET earlier this week that Harry knew he "had to up his game" after first meeting Meghan. The engaged couple hit it off rather quickly and, as we know, are now on their way to becoming husband and wife in a couple of months. 

Harry is also looking to the future and ready to become a father. 

"Prince Harry, particularly, is very keen to start a family, pretty soon after the royal wedding," Nicholl shared with ET on Tuesday. "He's made no secret about wanting children."

For more on the lovebirds' upcoming nuptials, watch below. And keep up with all of ET's coverage of the royal wedding right here as we count down to May 19.

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