Knox Leon Jolie-Pitt is keeping up with his martial arts and getting jacked in the process. On Monday, the 18-year-old was photographed leaving a Muay Thai practice in Los Angeles, and you can tell he's been putting on a lot of muscle.
© The Grosby GroupIn the pics, Knox was carrying his phone and a light gray gym bag while rocking a black T-shirt, white shorts, and gray sneakers.
© The Grosby GroupWhat has now become his signature pink hair was also on display. He first debuted it in November 2025.
© The Grosby GroupWhile Knox has largely kept a low profile, his dedication to Muay Thai has become increasingly visible. He's even been competing in the combat sport, which combines punches, kicks, elbows, and knees.
© The Grosby GroupIn June, Knox competed and won an exhibition bout at Total Sonic Knockout 5 in downtown Los Angeles on the same night as his high school graduation.
© The Grosby GroupHe had even mentioned the fight during his graduation speech, inviting those in attendance to watch him compete later that evening. “I’m gonna knock ‘em the f*** out!” he told the crowd.
© Backgrid/The Grosby GroupKnox has also competed in other events, reportedly winning gold at an IKF Point Muay Thai Technical competition in Los Angeles in July 2025.
His mother has been spotted supporting him at competitions, offering a glimpse into a side of their lives that is usually kept private.
In September, Knox reportedly joined a Muay Thai session at a gym in Kharkiv, Ukraine, during a visit with his mother, who has made several trips to the country amid Russia’s ongoing invasion.
Will they stay in LA?
© Getty Images for NetflixIt remains to be seen whether Knox and his siblings will continue to call Los Angeles home as they enter adulthood.
Angelina Jolie has previously spoken about wanting to leave Los Angeles and spend more time abroad once her children turned 18. She told The Hollywood Reporter in 2024, "I grew up in this town. I am here because I have to be here from a divorce, but as soon as they’re 18, I’ll be able to leave.”
The actress could be getting ready to make things official after selling her Los Feliz mansion to Madonna.
The dwindling Pitt surname
© GettyImagesWhile Knox is one of the few children of Brad Pitt who still legally has his last name, that may not be for long. When he graduated in June, he reportedly dropped the last name from his official high school diploma.
It's been an ongoing trend. His older sister Shiloh legally changed her name from Shiloh Nouvel Jolie-Pitt to Shiloh Nouvel Jolie after turning 18 in 2024.
Their sister Vivienne was credited as Vivienne Jolie in the Playbill for the Broadway production of The Outsiders, which she helped produce alongside her mother. Then in July 2026, she filed a petition to legally change her name from Vivienne Marcheline Jolie-Pitt to Vivienne Marcheline Jolie.
Then Zahara Marley and Maddox Chivan legally dropped Pitt in September. Pax has largely maintained a private life.
