Pitt treats Maddox to go-kart birthday

Brad Pitt took adopted son Maddox go-karting for his seventh birthday on Tuesday.

The Hollywood star, 44, spent a day on a race track in the South of France with his eldest child. Angelina Jolie remained at the Château Mira with the rest of their children.

"It was just Maddox and Brad," a source told People. "Just father-son time." Maddox apparently beat his father in the overall race.

The pair have previously been spotted playing with racing radio-command cars and various bikes. They have also been photographed at numerous Formula One events.