Brad Pitt took his son Maddox go-karting on Tuesday. The "Ocean's Thirteen" actor and his adopted son were celebrating Maddox's seventh birthday at a track in the south of France.

Brad Pitt says his new son Knox Leon looked like Russian Prime Minister Vladimir Putin when he was born. The 'Fight Club' actor - who welcomed twins Knox and Vivienne Marcheline with partner Angelina Jolie into the world on July 12 - was surprised by his children's unique looks.

The birth of twins Vivienne Marcheline and Knox Leon, born to Angelina Jolie and Brad Pitt on Saturday, was a moving and emotional experience for Pitt. The couple's doctor, Dr. Michel Sussmann, said that Pitt never left Jolie's side and even cut the babies' umbilical cords.