"They looked like they were in a world of their own," an onlooker tells PEOPLE

By Monique Jessen
Updated August 25, 2011 02:30 PM
Credit: Fame

Prince William sure knows how to treat his princess right.

He and wife Catherine turned up at the Cineworld in Llandudno Junction, Wales, for a romantic mid-week date night.

“They looked like they were in a world of their own. He had his arm around her waist as they walked in, as if he was guiding her,” onlooker and local Anella Bennett tells PEOPLE.

“They looked just like any other young couple enjoying a night at the cinema.”

After reportedly arriving through a back door, the Duke and Duchess of Cambridge, who were both dressed casually in jeans (with glamorous wedges for Kate), paused briefly by the popcorn kiosk to get some snacks for the 8 p.m. screening of The Inbetweeners, a British comedy that follows the lives of four teenage misfits and their wild antics abroad.

Last month, the couple saw another comedy, Bridesmaids, at the same cinema, which offers discounted admission on “Bargain Tuesdays.”

The damage for the royal couple’s movie tickets? Less than $16.