Marvel at Sebastian Stan's new look.
The Captain America star unveiled a major hair transformation on April 28, stepping out to the Los Angeles premiere of Thunderbolts*—in which he reprises his MCU role of Bucky Barnes a.k.a. the Winter Soldier—with a shaved head.
However, Sebastian kept the same facial hair he had been seen with in recent months, rocking some scruff on his chin and cheeks.
It appears the 42-year-old, who wore a dark gray suit and slate-colored shirt to the red carpet movie screening, buzzed off his hair for his part in Fjord, a Cristian Mungiu-helmed drama set in Norway.
Of course, this wouldn't be the first time Sebastian altered his appearance for a movie. Most notably, he gained 15 pounds in order to play a young Donald Trump in 2024's The Apprentice, a role that earned him an Oscar nomination.
"I had people tell me I don't look like him," he told Entertainment Weekly in October, explaining that getting fit for his various Marvel projects over the years made his cheeks "more hollow."
"So, I called a nutritionist who I worked with before, and I said, 'How do I quickly get bloating in my face,'" Sebastian continued. "He was like, 'Then what I need you to do is get ramen and put a bunch of soy sauce packets in the ramen and start having that, and you're going to get the salt in the face."
He also started drinking a vast amount of soda to prepare for his role as the 45th and 47th president of the United States, who is a huge Diet Coke fan.
"I actually started drinking a lot of Coca-Cola," Sebastian told Entertainment Tonight last year. "If you drink four Coca-Colas a day, a lot of things happen to your body. Don’t do it."
To cap it all off, the actor worked with makeup artists Jason Collins and David Williams, as well as hairstylist Barry Lee Moe—who all had helped him morph into drummer Tommy Lee for the 2022 series Pam & Tommy—to put the final touches on his transformation into the commander-in-chief.
But as Sebastian noted to EW, "I was always trying to steer to less prosthetics because I didn't want to go with a complete likeness. I wanted to go for the essence."
For more dramatic celebrity hair changes, keep reading.
Whitney Leavitt
The Secret Lives of Mormon Wives star channeled her OG MomTok era after cutting her long tresses into a chic bob in September 2026.
Connor Storrie
The Heated Rivalry star shocked fans after swapping out Ilya Rozanov's signature curls for a buzz cut amid filming season two of the gay hockey romance in August 2026.
John Cena
Two weeks after attending the Little Brother premiere with a full head of brown hair, the WWE legend debuted a shaved look ahead of his second hair transplant.
"Round 2 of [Follicular Unit Extraction] Treatment and this time I went all in for best possible results," he wrote on X June 29, 2026. "Thank you Ken Anderson and the staff at Anderson Center for Hair for accompanying me on this journey!"
John Oliver
The Last Week Tonight host debuted jet-black hair for a guest role on ABC's long-running soap opera General Hospital.
Kelly Osbourne
During London Fashion Week 2026, the Fashion Police alum donned a short black wig featuring blunt asymmetric bangs to walk the Natasha Zinko x OnlyFans show.
Carrie Underwood
Trading in her signature golden locks, the country music star wrote on Instagram in August 2025, "Well, the last time I saw my natural hair color, I was probably about 12 years old, but I thought it might be time to give it a second chance."
Sebastian Stan
The Marvel actor said goodbye to Bucky Barnes' signature long hair in April 2025, showing off a shaved head at the Los Angeles premiere of Thunderbolts*.
Tan France
The Queer Eye star had fans doing a double take when he ditched his signature gray hair for a dark brown 'do in April 2026. The fashion stylist noted at the time that the dramatic transformation was for a role and "not a midlife crisis."
Sami Sheen
The daughter of Charlie Sheen and Denise Richards shared her at-home hair dying journey, including its many missteps, on TikTok and raved about the results.
“I've been wanting to do this to my hair for years now," she said, "and I'm so happy that I finally did it.”
Selma Blair
In September 2026, the Legally Blonde actress traded in her long bob for a curly pixie cut.
Jessica Chastain
The Help star debuted her "choppity chop," she she put it, on the red carpet of the Breakthrough Prize Ceremony in April 2026.
Jason Momoa
In July 2025, the actor shaved off his beard for the first time in six years to film Dune: Part Three, which required him to rock a clean shaven look to reprise his role of Duncan Idaho.
Kelly Clarkson
The American Idol winner debuted a shorter hairdo in a July 2025 The Voice promo, trading her signature blonde waves for a shorter, darker bob style.
Chris Pratt
The actor debuted a bearded look, which he sports on season two of The Terminal List, in June 2025.
Finn Wolfhard
The Stranger Things star changed up his trademark shaggy hairstyle in May 2025 by debuting a buzzcut at the 2025 Crunchyroll Anime Awards in Tokyo, Japan.
JoJo Siwa
In March 2025, the "Karma" singer debuted her rainbow mohawk at the GLAAD Media Awards.
Emily Ratajkowski
In a March 2025 TikTok video, the model called this 'do with shaggy bangs the "worst haircut of my life."
Gypsy Rose Blanchard
The Gypsy Rose: Life After Lockup star debuted a short bob in March 2025, more than two months after giving birth to her and fiancé Ken Urker's first child, daughter Aurora Urker.
Whitney Rose
The formerly blond Real Housewives of Salt Lake City star debuted a red bob on Watch What Happens Live in January 2025.
Hailey Bieber
The model debuted lighter locks in September 2024, a month after giving birth to her and Justin Bieber's first baby, son Jack Blues Bieber.
Lily Collins
The Emily in Paris star debuted her dramatic transformation at the world premiere of her new horror movie, MAXXXINE, in June 2024.
"Changing my hair always brings out different sides of my personality and I love playing around," Lily told Vogue. "This cut and color feels bolder and yet somehow lighter. And completely more me—right now."
Katie Holmes
While attending Chanel's Tribeca Film Festival Artists dinner in June 2024, Katie debuted a subtle, yet striking transformation of rich caramel balayage highlights that were blended throughout her brunette tresses.
Kylie Jenner
The Kardashians star debuted a platinum blonde look and a bob haircut after rocking waist-length strands for quite some time.
"Did someone say they missed king kylie," Kylie teased in the caption of her June 8 Instagram post, to which her sister Khloe Kardashian cheekily replied, "I did! I did!!!!!!"
Lisa Rinna
The former Bravo star debuted a platinum blonde look during 2024 Paris Fashion Week Haute Couture.
Priyanka Chopra
The Heads of State star debuted a drastic haircut—a shoulder-grazing bob—while attending a Bulgari event in Rome i May 2024.
Jessica Biel
In May 2024, the actress chopped her hair into a bob that many fans on social media said reminded them of one of the looks she sported as Mary Camden on the '90s series 7th Heaven.
Megan Fox
The Transformers actress returned to her dark brown tresses and debuted a sassy bob in May 2024, a month after she dyed her hair blue to enter what she dubbed her "Jedi era."
Dannielynn Birkhead
At age 17, the daughter of the late Anna Nicole Smith debuted a new lob hairstyle overnight during 2024 Kentucky Derby weekend, which she attended with dad Larry Birkhead.
Demi Lovato
The singer debuted a lighter, shorter 'do in April 2024.
Kelly Osbourne
The Fashion Police alum debuted a blonde bombshell hair transformation May 8.