Not even the royals are exempt from “Star Wars” mania. Princes William and Harry of England were invited to the set of “Star Wars: Episode VIII” on Monday, where they were able to get up close and personal with some props from the films, including real lightsabers used by the actors. So now the question remains — which of the princes chose the dark side and which chose light?

Kensington Palace’s Instagram account featured several photos from their visit, one of which showed Prince Harry, 31, and Prince William, 33, in the middle of a grueling lightsaber battle. The younger of the two is photographed wielding Kylo Ren’s (Adam Driver) weapon while his brother fights back with Rey’s (Daisy Ridley). After their intense battle, the two were given a tour of the costume department at Pinewood Studios in Iver Heath, England. Pictures snapped during their time on the set show them discussing the costumes of Rey, Maz Kanata (Lupita Nyong’o), Chewbacca (Peter Mayhew) and more.

It was first announced early Monday morning that the royal duo would be paying the film studio a visit. The pair were invited because of the Duke of Cambridge’s position as BAFTA president. According to an early report from Hello magazine, the pair were joined on their visit by Ridley, one of the breakout stars of “Star Wars: The Force Awakens.” They also met director Rian Johnson, actor Mark Hamill and others who were present to film scenes on that particular day. Prince William and Prince Harry were not only allowed to try out some of the film’s props but also to see what exactly went into making them.

The movie set visit marked Prince Williams’ first outing upon returning from India, where he and wife Kate Middleton spent a week sightseeing and retracing the steps of Princess Diana, who visited the country 24 years ago. The Wall Street Journal reported that visiting the Taj Mahal was particularly special to William as his mother was photographed outside the famed tourist attraction more than two decades ago.