Britain's Prince Harry meets Chewbacca during a visit to the Star Wars film set at Pinewood Studios near Iver Heath, west of London, Britain, April 19, 2016. Prince William and Prince Harry are touring Pinewood to visit the production workshops and meet the creative teams working behind the scenes on the Star Wars films. (Photo by Adrian Dennis/Reuters)





Britain's Prince William talks with Chewbacca during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London, Britain, on April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain's Prince William (R) tries a light sabre against his brother Prince Harry during a visit to the Star Wars film set at Pinewood Studios near Iver Heath, west of London, Britain, April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain's Prince William, smiles at BB-8 droid during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. (Photo by Adrian Dennis/Reuters)





(L-R) US actor Mark Hamill, US director Rian Johnson, Britain's Prince Harry, Britain's Prince William, Duke of Cambridge, British actor John Boyega, Chewbacca and British actress Daisy Ridley pose during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain's Prince Harry sits in an A-wing fighter as he talks with US actor Mark Hamill during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain's Prince Harry meets Chewbacca during a visit to the Star Wars film set at Pinewood Studios near Iver Heath, west of London, Britain, April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain Prince William looks at droid C3P0 from Star Wars as they visit the creature and droid department at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain's Prince Harry sits in an A-wing fighter as he talks with US actor Mark Hamill during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain Prince William and Prince Harry look at droid C3P0 from Star Wars as they visit the creature and droid department at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain's Prince Harry meets Chewbacca during a visit to the Star Wars film set at Pinewood Studios near Iver Heath, west of London, Britain, April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain's Prince William is shown props including Chewbacca's crossbow (L) during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain's Prince William is hugged by Chewbacca as British actor John Boyega smiles during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain's Prince Harry takes a closer look at a robotic mask during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. (Photo by Adrian Dennis/Reuters)





British actors John Boyega and Daisy Ridley (R) speak while Britain's Prince Harry talks with Chewbacca during tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. (Photo by Adrian Dennis/Reuters)





Britain's Prince William is hugged by Chewbacca as British actor John Boyega smiles during a tour of the Star Wars sets at Pinewood studios in Iver Heath, west of London, Britain on April 19, 2016. (Photo by Adrian Dennis/Reuters)