The teen heart-throb’s long brown locks, which are usually in a quiff up off of his face, were casual and messy as he relaxed during the band’s world tour.
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Harry’s stylist Lou Teasdale posted the picture on her Instagram account. In the shot the 20-year-old stares intently into the camera while wearing a grey tee-shirt and displaying his many tattoos.
Making a reference to the casual style, the snap was simply captioned: "Indie".
Harry’s millions of fans responded well to the snap, with many comparing him to the character Tarzan.
Others took to commenting on Lou's picture, with one saying: "LOU I ADORE YOU FOR POSTING THAT!"
Another added: "look how cute he looks."
Harry Styles posted a snap of One Direction playing basketball
In another Instagram shot with Harry shared with his 7million followers, the One Direction lads can be seen shirtless playing basketball.
One Direction, which also includes bandmates Liam Payne, Louis Tomlinson, Zayn Malik, Harry Styles and Niall Horan, who were brought together by Simon Cowell on the seventh season of The X Factor.
They have gone on to be the most successful reality show group ever, despite finishing third on the show.
After the release of their third album, Midnight Memories, they became the first band in US history to have their first three albums debut at number one.
One Direction at the 2014 BRIT Awards
They have recently kicked off their international world tour, and are currently in Colombia, South America.
The band have been given an entourage of more than 200 guards and police to protecting them, as they perform in an area known to be a kidnapping hot spot.