Knox Jolie-Pitt, 16, looked muscular and toned in a tracksuit as he headed to a boxing gym in Los Angeles over the weekend.

Knox Jolie Pitt goes boxing. Photo: Grosby

Knox wears shorts and a T-shirt, his hands are wrapped in protective bandages and he carries boxing gloves. He has a crew cut, is tall and thin but has strong muscles. Knox’s appearance is described as resembling both his parents – actress Angelina Jolie and actor Brad Pitt.

Knox has inherited his father’s tall stature. Photo: Grosby/AKGS

Knox and his twin sister Vivienne turned 16 on July 12. Unlike her sister, who often appears in front of the camera and recently worked as a production assistant on their mother’s Broadway musical The Outsiders, Knox prefers to live a private life, away from the spotlight.

The twins became famous from a young age when they appeared on the cover of People magazine’s August 2008 issue when they were just three weeks old. As 𝘤𝘩𝘪𝘭𝘥ren, Knox and Vivienne often walked red carpets with their parents and often went out together. Knox often impressed with his handsome face, dignified demeanor and stylish fashion sense.

Knox (in a baseball cap) stands with his twin sister and siblings at the premiere of ‘Kung Fu Panda 3’ in 2016. Knox voices the character Ku Ku in the film. Photo: Invision

Knox, Vivienne and her sister Shiloh, 18, are Angelina’s three biological 𝘤𝘩𝘪𝘭𝘥ren with Brad Pitt. The former couple also have three adopted 𝘤𝘩𝘪𝘭𝘥ren: Maddox, 22, Pax Thien, 20, and Zahara, 19. All six 𝘤𝘩𝘪𝘭𝘥ren are currently living with their mother, with Maddox and Zahara attending college.

Shiloh recently attracted attention when she filed a petition to drop her father’s surname, which was approved by the court on August 19. Zahara and Vivienne also dropped their surname Pitt. The two older sons, Maddox and Pax Thien, have long been said to be estranged from their father. Meanwhile, Knox’s relationship with his father has not been disclosed.