On their 7th birthday, Brad Pitt and Angelina Jolie's twins, Vivienne Marcheline and Knox Leon went ice skating with their siblings, Shiloh, 9, Zahara, 10, Pax, 11, and Maddox, 13 at Van Buys, California on July 12, Sunday. 

US Weekly reports that the kids had a great time having fun on ice, holding hands while skating and got "wiped out" in an afternoon the birthday boy and girl had with family and friends.

"They rented a bus and headed for an afternoon of ice-skating at Iceland Ice Skating Center," a source told US. "Knox and Viv were bundled up with snow hats and mittens. They were really excited about it."

The eyewitness added, "everyone skated for about two hours and they tried out special bumper cars on the ice," the eyewitness adds. "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."

Getting dizzy and falling down is not really much of a problem for Vivienne. Earlier in March, OK! reported that Bragelina's little girl was snapped as she took a tumble when she was playing with her twin brother, Knox.

Arriving from a playdate at Bel Air Hotel, Vivienne got too excited or was probably still on a hype when she ran towards the door and fell down. Without asking any help from their bodyguard, the tough cookie got up from the ground, brushed off, and joined her brother walk into the hotel without any drama.

Vivienne has already proven her young bravery after starring alongside her Oscar winning mom as young Aurora in Disney's "Maleficent" in 2013.

In her 2014 interview with Entertainment Weekly, the "Mr. and Mrs. Smith" actress shared that Viv was not terrified to look at her as an evil lady. "The other 3- and 4-year-old [actors] wouldn't come near me. It had to be a child that liked me and wasn't afraid of my horns and my eyes and my claws. When Pax saw me for the first time, he ran away and got upset."

"It had to be Viv," she said proudly, witnessing her daughter follow her footsteps at an early age.

Happy 7th birthday, Knox and Vivienne Jolie-Pitt!