Talk about needing to do a double take!

Today is National Look-Alike Day, a day that celebrates those who have an uncanny similarity to someone else and we've rounded up some of the most convincing evidence that some people look just like famous celebrities.

You're not seeing double, it's just that these celebrities have doppelgängers that look so much like them that it almost seems like they have a long-lost twin.

There is no doubt these mirror images have to fend off being asked for autographs by fans who think they just ran into Harry Stylesat Starbucks.

Some of the celebrities on our list have seen, or even met, their look-alikes and have been shocked by the resemblance, like when Rihanna saw a picture of a little girl who could basically be her daughter and tweeted, "almost drop my phone, how?"

So take a look at the people who look just like Scarlett Johansson, Ed Sheeran, Taylor Swift and more.

Check out the list!

Harry Styles

Twitter/BACKGRID

Ariana Grande, Look-Alike

Instagram

Jennifer Lopez, Janice Gray, Instagram

Instagram

Gigi Hadid, Iza Ijzerman

Instagram

Rihanna, Ala?a skyy

Kristy Sparow/Getty Images For FENTY; Instagram

Regina George Doppelganger

Paramount Pictures/Studio One Photography

Ariana Grande, Jacky Vasquez

Instagram

Scarlett Johansson

Twitter/Getty Images

Leonardo DiCaprio, Celebrity Look-Alikes

Getty Images

Taylor Swift, Celebrity Look-Alikes

Instagram; Getty Images

Ed Sheeran, Baby

Getty Images; Courtesy Zoe Walton

Steve Harvey, Celebrity Look-Alikes

20th Television

Chelsea Marr, Angelina Jolie

Instagram, Jemal Countess/Getty Images

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