The 44-year-old Oscar winner debuted his ponytail on Thursday when he stepped out in Beijing, China for a press conference about his film The Great Wall. (Let us also point out that he's holding the biggest mic flag of all time.)
While we're used to seeing Damon clean cut, and even sometimes buzzed cut, he seems to pull of the ponytail quite well! Damon seems to be digging the new 'do too, given the high spirits he was in at the event. Maybe he can suggest this look as the perfect post-breakup hairstyle for his best friend, Ben Affleck?
It's still unclear if the Good Will Hunting star grew out his hair for a role, or if he just wants to fit in with the surfers this summer.
As for The Great Wall -- also starring Andy Lau, Jing Tian and Pedro Pascal, and directed by Zhang Yimou -- the film is about the mystery centered around the construction of the Great Wall of China. The mystery thriller doesn't hit theaters in the U.S. until Nov. 2016.
What do you think of Damon's ponytail? Hit or miss?
While the A-list actor is trying out this long-haired look, Ariana Grande is considering ditching her signature ponytail. See how her fans are reacting:
Check out some of this year's celebrity hair transformations:
Celeb Hair Transformations 2015
Matt Damon has a ponytail and he's totally pulling it off!
Well that's a new look! Hilary Duff, 27, debuted an ocean-colored hue on Instagram and jokingly said, "Mermaids luuh sushi💙💚 #sugarfish."
Idina Menzel was apparently ready to let go over her dark tresses. The "Frozen" star took a page from Elsa's book and dyed her hair a bright, platinum blonde. Do you like the look?
Pete Wentz typically keeps his short buzz cut dark brown, but the Fall Out Boy rocker went for a bright bold fuschia color just in time for spring. The 35-year-old took to Instagram to share the news and said, "You're a cherry blossom. @michpugh for the hook up."
Talk about a scandal! Right before her guest appearance on the hit ABC show, Lena Dunham buzzed her locks in favor of a short coif. Of her new 'do she said, "Zero prep required with my new 'do by my hair's soulmate @rheannewhite ❤️❤️❤️"
Dunham wasn't the only actress debut a new spring chop! Jessica Alba took her shoulder-length locks up a few inches and took to Instagram to share the news. "Uh oh someone chopped off her hair!"
It looks like January Jones would love a role in "Grease." The stunning star rocked a light pink 'do and said, "Call me "Frenchie".. Thanks for the dip @jenniferjbeauty."
Kim Kardashian knows how to make a bold statement! Kanye's leading lady went from the dark side to the bright side with hew new platinum hairdo, which she debuted at Paris Fashion Week.
Nicole Richie is no stranger to playing with hair color. The House of Harlow designer recently hit the town with bright pink tresses. The look is a nice change from her typical lavender locks.
Whoa! We almost didn't recognize you, Chrissy Teigen. The supermodel switched out her light locks for a very 'dark, very voluminous hairdo!
Lauren Conrad didn't go for a super wild change this year, but the fashionista did stay on trend with her cropped coif.