One Direction stars Harry Styles and Liam Payne were filmed as they trekked up to the MAChu Picchu landmark, sparking speculation they are starring in another documentary.

The What Makes You Beautiful hitmakers' first feature film documentary, This Is Us, was released in 2013 and showed the singers on their 2013 tour.

Now fans are speculating another fly-on-the-wall show is in the pipeline as they were joined by producer Ben Winston and a camera operator on their trek to the ancient Inca site.

Styles and Payne used a day off from the band's 2014 world tour to pay a visit to the site in Peru, while the other three band members shunned the early start in favour of staying in bed, according to a U.K. report.

The Where We Are tour is due to continue in Santiago, Chile on Wednesday (30Apr14).