Angelina Jolie and Brad Pitt treated their twins to an ice skating birthday party.

The couple's youngest children, Knox and Vivienne, turned seven on Sunday (12.07.15) and enjoyed a weekend of fun to mark the milestone.

The youngsters visited Toys 'R' Us on Friday (10.07.15) to pick out some new toys, before picking up lunch from a nearby branch of Subway and heading back to their Los Angeles home to play with their new purchases.

According to TMZ, Brad and Angelina spent $44 in Subway and left a $6 tip for their food, a pair of foot-long meatball marinara sandwiches, a chicken teriyaki sandwich and children's meals.

Then on Sunday, the twins were joined by their famous parents, siblings Maddox, 13, Pax, 11, Zahara, 10, and Shiloh, nine, and a group of friends to take a trip to Iceland Ice Skating Center in Los Angeles.

A source told Us Weekly magazine: ''They rented a bus and headed for an afternoon of ice-skating at Iceland Ice Skating Center.

''Knox and Viv were bundled up with snow hats and mittens. They were really excited about it.

''Everyone skated for about two hours and they tried out special bumper cars on the ice. They were spinning around getting dizzy and had a blast. Some of the kids were holding hands as they skated and it was really sweet.''