Knox Jolie-Pitt, 18, debuted a bold crimson dye job on Monday.
The son of Angelina Jolie, 51, and Brad Pitt, 62, was photographed leaving a Muay Thai class in Los Angeles with dark red spikes and bleached-blond shaved sides.
He had sported platinum blond hair as recently as Aug. 5, making this transformation a same-week switch.
Knox has cycled through multiple colors since January.
He kicked off 2026 with platinum strands, moved to fiery orange by spring, and rocked cotton candy pink spikes last November.
The pastel look, debuted on a grocery run in Los Feliz, drew instant comparisons to his mother’s hot pink bob from the 1998 film “Playing by Heart.”
Angelina herself spent the late ’90s proving she could pull off everything from a shaved head to a spiky bleached pixie to the choppy platinum bob she wore in “Girl, Interrupted.”
She arrived at the 2000 Golden Globes with a blueish-gray crop, then collected her Oscar that March with waist-length jet-black hair.
Knox turned 18 on July 12, minutes ahead of twin sister Vivienne.
He is the second youngest of Jolie and Pitt’s six children.
The “Mr. & Mrs. Smith” co-stars split in 2016 and spent more than eight years in legal proceedings before finalizing their divorce in December 2024.
All six children have sided with Jolie, with multiple legally dropping Pitt from their surnames.
A Page Six exclusive in June revealed Knox’s Fusion Academy diploma listed him as “Knox Jolie.”
The accomplished fighter celebrated graduation alongside his mother, older siblings Pax and Zahara, and Vivienne.
He spent that same night in the fighting ring at a Downtown Los Angeles club.
“Tonight, I’m gonna be fighting at Total Sonic Knockout 5 at 12:45 a.m., so catch me,” Knox announced during his graduation ceremony in a clip shared online.
“I’m gonna knock ’em the f— out!” He added as the crowd cheered.
An insider close to the “Maleficent” star exclusively said last month that Jolie supports his passions.
“Angie hasn’t been fighting and isn’t angry. She just wants everyone to heal,” the source said.
Pitt, meanwhile, has maintained little to no contact with the children since the split.
Knox is among the few siblings who has publicly kept Pitt in his surname, though his diploma suggests a shift.
His Muay Thai training has become a constant in his life, with Jolie and Vivienne previously spotted cheering him at competitions.
In the viral moment that first put his fighting ambitions on the map, Knox used his June graduation speech to hype his same-night bout. He grabbed the microphone at Fusion Academy and told classmates to catch him at the downtown club. The crowd erupted. Hours later, he won his exhibition match.
Knox’s latest hair transformation comes amid this period of personal milestones.
The chameleonic tendency appears firmly inherited.
Jolie remains a constant presence at her children’s sporting events, scholastic milestones, and performances.