We all likely have a doppelgänger in the world somewhere. And that's not limited to just everyday people who are running into their look-alikes. Celebrities do, too.
Jessica Chastain and Bryce Dallas Howard get mistaken for each other all the time. Fans are convinced others share such a resemblance that they must have been separated at birth.
The "Modern Family" and "Ted" actresses say they get mistaken for the other all the time. Upon meeting each other in December 2010 at a Nylon party, the two decided they'd pretend to be each other in public.
"She came up to me and said she gets called me all the time too," Hyland told InStyle. "She said that sometimes she pretends she's me because it makes her feel young. I asked if I could pretend to be her next time somebody asks me if I'm her, and she said OK."
Short, long, curly, or straight hair, Keira Knightley and Natalie Portman look strikingly similar no matter how you pair them.
The two look so similar, Knightley played Portman's double, Sabé, in "Star Wars: Episode I - The Phantom Menace."
Neeson has said people often confuse the "Harry Potter" and "Taken" stars. That shouldn't be too much of a surprise since the two have starred in multiple films alongside each other ("Schindler's List," "Wrath of the Titans"). The only difference is that Fiennes usually plays the bad guy while Neeson's the hero.
"He is one of my best, best, dearest friends. I keep getting fans and stuff mixing me up with Ralph because we have very similar profiles," Neeson said on The Jonathan Ross Show in 2014. "So I've been complimented on winning a Tony Award for my Hamlet, he's been complimented on the 'Taken' movies."
Despite the eye color difference, the "Arrival" and "Bachelorette" actresses get confused often. Fisher joked about the duo's striking resemblance in her cover story with Allure in January 2009.
"If 'Shopaholic' is a hit, then it was Isla Fisher in the movie," said Fisher. " ... and if it doesn't work out, it was Amy Adams."
Fisher used Adams' photo in her Christmas card one year and fooled both family and friends.
The "New Girl" actress was initially kind of frustrated when fans confused the two.
"It's a little bit annoying, to be totally blunt," Deschanel told MTV back in 2009. "The only similarity that we have is that we look a little bit alike."
The actress has since appeared to warm up to the similarity.
"I was relieved because everyone kept saying ‘this girl looks so much like you,'" she told Letterman in November 2012. "And then I met her and I was like, 'Thank God she’s attractive!' I was worried she was gonna be an unattractive person."
We're not the first to confuse the "300" and "Children of Men" actors.
When it comes down to it, we remember Butler is more likely to star in romantic comedies ("Bounty Hunter," "P.S. I Love You").
Susan Sarandon said at the Glamour Women of the Year Awards in 2016 that she and Weaver get mistaken for one another.
"I wanna just clarify a few things. Sigourney may have left the stage but we are two different people. I have taken credit for 'Alien' many times and she's signed autographs for me,” she said at the ceremony, according to Page Six.
In 2014, Sarandon wrote an op-ed suggesting Weaver is her "bad-ass alter ego."
Ever since the two co-starred in "10 Things I Hate About You," we always thought Gordon-Levitt could play the late Ledger's twin.
Elizabeth Banks admitted she pretends to be Handler when people confuse her with the comedian.
"I was sitting in Toronto and a guy walked up to me and said, 'Oh my god, my girlfriend loves you. She would die if I didn't get your autograph. This is so exciting!'," she said during an appearance on Lately's former show "Chelsea Lately" in 2011. "He's like, 'I just love your books. I mean, My Horizontal Life...' I was like, 'Oh, he thinks he's meeting Chelsea Handler.' I couldn't ruin it for him!"