Prince William reveals 'cringing' moment with Taylor Swift, some of his favorite tunes and car rides with his mom and Harry

Prince William walks near St. Mary Magdalene Church on the Sandringham Estate in Norfolk.

London (CNN)The Duke of Cambridge will take listeners on a walk down memory lane when he joins forces with Apple Fitness+ for a special festive episode of its "Time To Walk" audio series.

William, 39, is hoping to encourage people to take a break and go for a walk for their mental wellbeing over the Christmas period. CNN understands the duke is a fan of the series and approached Apple about the project.
William opens the episode contemplating his father's love of walking and that while growing up, Charles "used to try and force Harry and I out of the house the whole time" adding that "we weren't really having any of it."
    "But now, as you get older, you appreciate it a lot more and you see it for what it is," William says.
      The royal is the latest star to record a walk-and-talk for the series, available on Apple Watch with a Fitness+ subscription.
      Each episode, which ranges between 25 and 40 minutes in length, is designed to be an immersive experience. Featured guests take a stroll in a meaningful location and reflect on life's lessons while sharing memories and experiences through stories, photos and songs.
      The Duke of Cambridge talks in the podcast of the importance of keeping mentally fit.
      William's walk -- which he recorded back in the spring -- takes him across his family's sprawling 20,000-acre Sandringham Estate in Norfolk, eastern England. Starting at Sandringham House, he takes in the sights and sounds of "the great British countryside, as we like to call it" while heading towards St. Mary Magdalene Church, where the royals are due to attend Christmas Day church service later this month. He ends the journey standing outside Anmer Hall, the home he shares with wife, Catherine, and their children.
        Reflecting on his family's annual Christmas Day pilgrimage, William talks of his "strong memories" of his grandfather plowing ahead while "there'd be us at the back with little legs trying to keep up."
        During the episode, the prince discusses the importance of keeping mentally fit and recalls one moment nearly a decade ago that left him sweating at a black tie event.
        Musing that he "can't believe I'm actually tell this story," he talks about a 2013 fundraising gala at Kensington Palace that US singers Jon Bon Jovi and Taylor Swift attended, "which nearly knocked me off my feet."
        Prince Charles,  Catherine, Duchess of Cambridge, Princess Charlotte of Cambridge (unseen), Prince William and Prince George arrive for the royal family's traditional Christmas Day service at St. Mary Magdalene Church in Sandringham, Norfolk, eastern England, on December 25, 2019.