Brad Pitt and Angelina Jolie‘s son, Knox Jolie-Pitt, debuted a new hair transformation while he was recently sighted at a Muay Thai practice session.

The 17-year-old and his twin sister, Vivienne Jolie-Pitt, are the last of six children shared by the former Hollywood power couple.

Unfortunately, amid Brad Pitt and Angelina Jolie’s continued legal battle, Knox and his siblings’ relationship with their father remains strained.

Knox has seemingly ditched his brunette locks for a more colorful option as he was seen out rocking a pink hairstyle.

The 17-year-old son of movie stars Jolie and Pitt looked happy and energetic in photos and videos posted online as he observed a Muay Thai match: a combat sport he has become known for in recent months.

Fans took to social media, with many praising how the teenager is able to express himself freely through his style.

On TikTok, a person wrote, “I love how freely they can express themselves without fear of judgment.”

Another noted, “I love all Jolie’s kids, they are normal, dress normal, just like normal citizens, unlike other celebrities’ children.”

Netizens also noted how much Knox looks like his mother, while some claimed he bore a striking resemblance to her brother, James Haven Voight.

“Wow, he really favors the Voight family. Good looking!” a person commented, while another said, “He looks just like his uncle.”

Knox’s love for the martial arts known as Muay Thai became well-known after he won a major competition just as he turned 17.

Back in July this year, the teenager marked his birthday by winning the IKF Point Muay Thai Technical competition.

His mother, Jolie, was notably by his side to cheer him on to victory. However, Pitt was not present for the occasion, likely due to the growing strain in his relationship with his six children.

For the Muay Thai competition, Jolie donned an all-black outfit, alongside Knox, who wore black shorts and a T-shirt.

The teenager could be seen smiling for the camera in some photos shared online while flashing his white mouth guard with a medal hanging proudly around his neck.

Even though Pitt has finalized his divorce from Jolie, the former couple remained locked in a bitter legal battle over the actress’s sale of her share in their French winery, Château Miraval.

Since the fallout between the movie stars in 2016 after a private plane incident, during which Pitt allegedly got physical with Jolie and one of their kids, his relationship with the six siblings has deteriorated over the years.

According to People Magazine, Pitt now “virtually has no contact” with the older kids, Maddox, Pax, Zahara, and Shiloh, who are all over the age of 18 and can no longer be subjected to any custody arrangements between their warring parents.

However, while Jolie has the twins, Vivienne and Knox, “most of the time,” the actor still has “visitation” with them as they are presently under 18. But, due to his busy filming schedules, Pitt’s “engagement” with the twins is said to be even more “limited.”

Things only seem to have gotten worse regarding the actor’s relationship with his kids, as some of them have dropped his last name, “Pitt.”

His daughter, Shiloh, made headlines last year when she took legal steps to cut ties with him the minute she turned 18, by officially changing her last name from “Jolie-Pitt” to just “Jolie.”

At the time, sources told the Daily Mail that Shiloh’s reasons may be tied to the fallout between her parents.

“The name change goes back to the custody battle, and Shiloh’s belief that her rights as a victim were violated,” an insider said. “Shiloh believed she had the right, as a victim of crime, to testify — and was prevented from doing so.”

Unlike Shiloh, her siblings, Zahara, Pax, and Vivienne, have yet to drop their father’s name legally; however, they have all publicly avoided use of it on certain occasions.