Brad Pitt reunited with twins Vivienne and Knox, 5, at Legoland in Windsor, England on Sept. 29, following their visit with mom Angelina Jolie in Australia. Credit: FameFlynetUK/FAMEFLYNET

Co-parenting, long-distance-style! While Angelina Jolie is working on her next directorial project, Unbroken, in Australia and Brad Pitt is working on his new movie, Fury, in the U.K., they're dividing up their six kids. Pitt, 49, was spotted reuniting with twins Vivienne and Knox, 5, at Legoland in Windsor, England on Sunday, Sept. 29.

The adorable blonde twins joined their dad in the U.K. after spending time with their mom in Sydney. Pitt was photographed treating his twins to rides, toys and treats at one of their favorite theme parks. (The entire Jolie-Pitt family -- Pitt, Jolie, 38, Maddox, 12, Pax, 9, Zahara, 8, Shiloh, 7, and Vivienne and Knox -- visited the same Legoland for the fifth time back in May 2012.)

Sporting his new short haircut and an all-black ensemble, handsome Pitt ushered Vivienne and Knox around the park while they sipped on colorful drinks. The youngest of the Jolie-Pitt kids were dressed in warm sweaters and boots for the outing.

Siblings Zahara, Shiloh and Pax, meanwhile, were photographed with Jolie visiting a surf shop in Sydney on Friday, Sept. 27. Pitt's fiancee had all six of their kids with her on location since arriving Down Under on Sept. 6, while he was busy promoting 12 Years a Slave at the Toronto International Film Festival. 

"Yeah, she's got her hands full," Pitt joked to Access Hollywood at the time. "I'm actually jealous."