Actor Robert Pattinson seemed to be in a playful mood when he grabbed his girlfriend FKA Twigs's derriere while strolling here recently.

The duo had stepped out together Friday afternoon for a lunch when photographers spotted the "Twilight` star grabbing the British singer's buttocks, reports eonline.com

Looking casual in a sweatshirt with shorts, the actor also held her hand as they enjoyed their meal.

The couple's rare PDA moments come just a few days after FKA Twigs said that dating one of the most famous men in Hollywood isn't very easy.