20 Celebs Who Look So Much Alike, They Could Be Related (PHOTOS)

This Black Swan stunner has both beauty and brains. She holds a degree from Harvard. She also looks remarkably like another Hollywood beauty, Kiera Knightley.

Pirates of the Caribbean star Kiera Knightley welcomed her first child with husband, James Righton, in May. The brunette beauty bears a striking resemblance to Portman, who also has dark hair and eyes. 

Swoon alert. What do Ian Somerhalder and Chace Crawford have in common? Sultry eyes, a structured jaw, and model looks -- some things really are better in pairs.  

Sexy Chace Crawford is returning to TV this fall in the ABC primetime soap, Blood and Oil. Unlike his non-related twin, Ian Somerhalder, this Hollywood hottie is single.

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Since her recent wedding to rocker Benji Madden, the gorgeous actress, who bares an uncanny resemblance to supermodel Helena Christensen when her hair is dyed dark, has been quietly enjoying married life. 

This stunning fashion model, whose perfectly contoured face looks a lot like Cameron Diaz's, has graced the covers of Elle, Vogue, Bazaar and more. Gifted with great genes, it's hard to believe Christensen is 46!

The fiery beauty is often mistaken for actress Amy Adams in the tabloids. She recently welcomed her third child, a boy, with husband, Sacha Baron Cohen, and rocked her post-baby body in a fitted dress shortly after. Happy to take supporting roles for now, Fisher's priority is her family. 

At first glance, it's easy to mistake Amy Adams for Isla Fisher. The gorgeous redheads even crossed paths at their daughters' dance class. But Adams says she doesn't see the similarity. Umm, really?

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Hang on to your dollar bills, Magic Mike star Channing Tatum may have a twin! Has anyone else noticed the resemblance between Tatum and Prison Break's Wentworth Miller?

Unlike his lookalike Channing Tatum, Wentworth Miller has yet to be seen shedding his clothes on screen, much to the dissapointment of Prison Break fans. The 42-year-old Miller recently announced he's gay. 

It comes as no shocker that Esquire named Penelope Cruz the Sexiest Woman Alive in 2014. With her flawless olive skin and gorgeous silky dark hair, she's often mistaken for fellow Latina actress Paz Vega. 

Spanglish's Paz Vega's resemblance to Penelope Cruz is downright spooky. Even the way they style their hair is near identical. You can catch Vega, who hails from Seville, Spain, in her latest film, Cat Run.

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It's not hard to believe that supermodel Christy Turlingtion has appeared in over 500 magazines. Her flawless complexion, honey-colored hair and chiseled features might have you thinking you've seen her on the silver screen, when in fact it's probably her lookalike, Jessica Biel.

Jessica Biel's supermodel good looks are surely one of the things that first appealed to the music industry's most sought-after bachelor, Justin Timberlake. The two married in 2012 and had a baby boy, Silas, earlier this year.

The Jonah Hex beauty shares many features with the striking Jolie, including sex-symbol status and smoldering dark looks. She's married to former 90210 actor Brian Austin Green.

Angelina Jolie is way more than a pretty face. The award-winning actress and director, and wife of hottie Brad Pitt, is an ambassador, a humanitarian, and mama to six adorable kids.  

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The soft, wavy blonde hair and fair skin make the American Sniper star, who has called her daughter the "love of her life," a dead ringer for Mollie King.

You must admit Mollie King looks eerily similar to another British beauty, Sienna Miller. The Saturday's band member, who was once linked to Prince Harry, has one of the hottest female bands on the planet!

She may easily be mistaken for Josh Groban's new girlfriend, Kat Dennings, but she's actually her coiffed lookalike, Marion Cotillard. The French actress is slated to star with Brad Pitt in an upcoming spy thriller. 

This gorgeous gal is known for her films The 40-Year-Old Virgin and most recently, Thor, as well as for her role in the TV series Two Broke Girls. Nowadays Dennings can be seen arm-in-arm with musical heartthrob Josh Groban.

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If you watched her present at the 2015 Oscars, you would never believe Scarlett Johansson recently had a baby girl. There's something about her porcelain skin and blonde hair that bears resemblance to Johnny Depp's new lady, Amber Heard.

No that is not Scarlett on the arm of Johnny Depp. Co-stars Amber Heard and Depp met while on set for the 2011 film Rum Diaries.