In 2012, New Girl's Zooey Deschanel openly discussed her thoughts about being mistaken for the pop star on the Late Show with David Letterman. "I was relieved because everyone kept saying, 'This girl looks so much like you,' " she said. "And then I met her and I was like, 'Thank God she's attractive!' "
On The Graham Norton Show in 2014, Keira Knightley revealed that she was cast to play Natalie Portman's double in Star Wars: Episode I — The Phantom Menace at the age of 12. "They just kind of kept on shoving me forward, and I'd be dressed in exactly the same thing that she was dressed in, but nobody told me why," Knightley said.
Though their resemblance was largely overlooked at the time, Joseph Gordon-Levitt starred alongside the late actor in 1999's 10 Things I Hate About You.
Logan Marshall-Green has starred in 2012's Prometheus and television series such as 24, The O.C. and Dark Blue. Tom Hardy, who bears a striking resemblance to the fellow actor, has appeared in 2010's Inception and 2012's The Dark Knight Rises.
The late-night host's wide smile and specs make for an uncanny resemblance to Full House actor Bob Saget.
Gossip Girl actress Leighton Meester starred opposite Minka Kelly in the 2011 horror film The Roommate, where she played the role of Kelly's psychotic and obsessive college roommate.
Jeffrey Dean Morgan is known for his roles in 2009's Watchmen and medical drama Grey's Anatomy, while Javier Bardem is best known for starring in 2010's Biutiful and 2007's No Country for Old Men, for which he won his first best supporting actor Oscar.
Leelee Sobieski, 31, bears such a resemblance to Helen Hunt, 51, that she has often been mistaken as Hunt's younger sister despite the 20-year age gap.
Scarlett Johansson will appear next in Avengers: Age of Ultron (releasing May 1), while Johnny Depp's spouse Amber Heard can be seen in upcoming films Magic Mike XXL and The Danish Girl.
In an interview with the Huffington Post, Nickelodeon star Victoria Justice admitted that she gets "the Nina thing a lot," adding that she considers the comparisons to Vampire Diaries actress Nina Dobrev "flattering."
On Late Night with Conan O'Brien, Harry Potter alum Tom Felton shared that he has gotten mistaken for Aaron Paul on a few occasions. "There was a Christmas party this year where a rather merry gentleman threw his arms around me and went on to tell me how much of a fan of my work he was," Felton recounted. "Finally, after 20 minutes, he called me Jesse [in reference to Paul's character in Breaking Bad] and by that point, I was too deep to sort of correct the guy."
Jaime Pressly is best known for her role as Joy Turner on NBC's My Name Is Earl (which ran from 2005 to 2009), while Australian actress Margot Robbie, relatively new to the American film scene, has starred in Martin Scorsese's The Wolf of Wall Street and Focus.
The redheaded actresses starred together in 2011's civil rights-era film The Help, which also featured Emma Stone, Viola Davis and Octavia Spencer.
Eli Roth admitted to looking like Zachary Quinto at the Sundance Film Festival when he posted a photo of the two on Instagram captioned: "#Sundance is always a who's who."
Chris Klein has named the Matrix star the celebrity he most often gets mistaken for. "I can't tell you how much more excited they are when they think I'm Keanu Reeves than when they think I'm Oz from American Pie," he once said.
Though Amy Adams and Isla Fisher are close friends (their children once attended the same dance school), Adams admitted that she doesn't see the resemblance between her and Fisher at all. "I get Isla Fisher all the time, still," the actress told Vanity Fair. "When I'm with Isla, we both look at one another and say, 'I get it but I don't get it.' "