Meghan Markle's health-conscious lifestyle is rubbing off on Prince Harry.

Prince Harry and Meghan Markle

Prince Harry and Meghan Markle

The former 'Suits' actress is set to marry the British royal at St George's Chapel at Windsor Castle on May 19, and ahead of their big day, it's been revealed that Meghan is already proving to be a good influence on her future husband.

Royal expert Katie Nicholl shared: "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.

"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."

The 36-year-old beauty's love of yoga has encouraged the Prince to follow suit, and Meghan's friends have been amused to see the influence she's already having on him.

Katie - who authored the book 'Harry: Life, Loss, and Love' - told Entertainment Tonight: "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.

"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."