Brad Pitt took his youngest son, Knox, 7, to the MotoGP British Grand Prix on Aug. 30 Credit: Mike Marsland/WireImage

A day at the races! Brad Pitt and Angelina Jolie's 7-year-old son, Knox, got his dad all to himself on Sunday, Aug. 30, when the two hit up the MotoGP World Championship in Northampton, England, sans Jolie and the rest of the couple's brood, including Knox's twin, Vivienne.

The father-son duo enjoyed some quality one-on-one bonding time while taking in the action at the British Grand Prix. They were photographed watching the race together amid the crowd, and even posing with some of the racers.

The By the Sea actor, 51, kept it casual in a black shirt and a gray newsboy cap, while his look-alike, youngest son sported a blue windbreaker and green safety headphones to protect his little ears.

Pitt was at the event to promote his upcoming documentary Hitting the Apex, about the fastest racers in the world. He produced and narrates the film, which opens in the UK on Sept. 2.

"First of all, I want to say it's great to be here at Silverstone. We're here for Mark Neal's film and he's made a great one, another great one," the Fury star said on Sunday (via ET). "It's exhilarating. It's really moving. It's got a universal mythological tale to it and we're really proud to get it out there. I'm telling you, the hardcore fans are going to love it, the newcomers to the sport are going to love it, and we're really proud."

Pitt and his family have been spending an increasing amount of time across the pond in recent months. In fact, as Us Weekly exclusively reported in the Sept. 7 issue, he and Jolie have been "house hunting in London."

"Angie wants to slowly immerse herself in E.U. politics," a source told Us of the Maleficent actress and mom of six, who devotes much of her time to philanthropy and is also a Special Envoy of the UN High Commissioner for Refugees.

The A-list couple even had tea with the Duke and Duchess of Cambridge, Prince William and Kate Middleton, in late June. As a Kensington Palace spokesperson told Us at the time, "They discussed their shared interest in combatting the illegal wildlife trade."

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics, and more delivered straight to your inbox!