There is a theory in the strange and fascinating world of psychology that, when we choose our partners, we tend to scope out people who look similar to us in appearance.
If we like ourselves and believe that we are attractive, we subconsciously seek the same kind of characteristics and qualities within other people. This theory is restricted to choosing potential mates, though the same can often be said for friendships.
When we choose friends we often seek out warm faces in the crowd-- faces that look nice, genuinely kind, and are perhaps not all that different from our own. If you were to take a look at some of your friends, you may be surprised to discover that some of them look pretty similar to you.
The same can be said for many Hollywood celebrities, who also look similar to their best friends. In fact, some look so similar that fans occasionally confuse them as siblings.
With that said, here are the 15 Celebrity Besties Who Look Exactly Like Twins.
15 Aubrey Plaza & Mary Elizabeth Winstead
Mary Elizabeth Winstead and Aubrey Plaza met each other on the set of Scott Pilgrim vs The World. Winstead played Ramona, the romantic interest of Scott (Michael Cera), who tries to court her by battling and defeating her seven evil exes.
Meanwhile, Plaza played an ex of Scott's friend Stephen Stills. The two hit it off and have since hung out together. Winstead even attended the official worldwide FX premiere of Plaza's new show, Legion, just to show Plaza support.
The two have often been seen in public with one another and even did an interview discussion together for BUST Magazine back in 2012. To top things off, the two look incredibly similar to one another and are occasionally mistaken for twins.
14 Selena Gomez & Francia Raisa
Francia Raisa is best recognized for her five year stint as Adrian Lee on the ABC Family drama Secret Life of the American Teenager. Selena Gomez is recognized for, well, being Selena Gomez.
Starting with various childhood television appearances, Gomez has gone on to appear in bigger films, such as Spring Breakers and Monte Carlo, and has landed a successful musical carear.
Gomez and Raisa have been friends since they met at a celebrity get-together at a Children's Hospital sponsored by ABC Family and Disney ten years ago.
Later, after Gomez found out that she needed a kidney following her lupus diagnosis, Raisa was kind enough to offer hers to her best friend. The operation was a success and the two have been rocking her surgical scars proudly.
13 Jennifer Lawrence & Amy Schumer
Jennifer Lawrence and Amy Schumer were introduced when Jennifer Lawrence name dropped Schumer on TV. Before Schumer had a chance to freak out about it, Lawrence contacted her via email.
Their emails turned into text messages, which transpired into an all girls boat trip. They quickly realized that they had far more in common than just similar faces. This makes sense since both of their personalities have been noted to be somewhat eccentric and they are both either loved or hated by fans.
While people find the two entertaining, charming, and relatable, others believe that their personalities are obnoxious and unappealing. Love them or hate them, their bond remains strong and sacred.
12 Poppy Delevingne & Sienna Miller
As the older sister of Cara Delevingne, Poppy Delevingne comes from quite the talented and privileged family. Her father is property developer Charles Delevingne, which means that Poppy spent much of her life living in luxury, although she eventually got an apartment in New York with her best friend Sienna Miller.
Miller is best known for her affair with Jude Law, which dominated the tabloids of the mid-2000s, though she has plenty of her own accomplishments. For example, she was nominated for a Golden Globe for her performance as Tippi Hedren opposite Toby Jones' Alfred Hitchcock in The Girl.
Both Miller and Delevingne are close friends and look incredibly alike.
11 Minka Kelly & Leighton Meester
Minka Kelly and Leighton Meester famously appeared together onscreen in the 2011 psychological thriller The Roommate, but the two had started their longstanding friendship long before the movie even went into production.
The two met while filming separate commercials for Clearasil's skin care products. Both Kelly and Meester happened to cross paths and have stayed close since then.
For the most part, their careers have remained distant but similar. While they never appeared together onscreen until The Roommate, both actresses got their big break on television shows. Meester was on Gossip Girl, while Kelly had a role on Friday Night Lights.
10 Chace Crawford/Ed Westwick
On Gossip Girl, Chace Crawford and Ed Westwick had quite the bromance. After all of their time spent together on set, it was only a matter of time that the actors would go on to form a bromance of their own.
While promoting his then-brand new ABC show Wicked City, Ed Westwick revealed that he would like to have a Gossip Girl reunion with Crawford, who also had a brand new show to promote on ABC.
In recent years, Crawford has been keeping himself busy with television shows like Blood & Oil and Casual, as well as a plethora of movies that are already in production. Ed Westwick, on the other hand, has seen better days.
9 Karlie Kloss & Taylor Swift
Karlie Kloss and Taylor Swift have been linked together publicly as the best of friends for a long time. In fact, their close friendship dates back to 2012. During an interview, Swift stated that she was a big fan of Kloss' work and that she really wanted to bake cookies with her.
Kloss then tweeted Swift asking who's kitchen should they do it in. Sadly, the two didn't get a chance to bake cookies together, but a year later in December Swift appeared at the Victoria's Secret Fashion Show as a musical guest.
Kloss happened to be modeling at the event and she took the opportunity to talk the singer in person for the first time. The two instantly clicked and have been glued to one another ever since.
8 Bella Thorne & Lele Pons
Bella Thorne began acting at only six years old back in 2003. While she has a small appearance in major Hollywood movies every now and again, Thorne got her first big break when she was cast as the co-star of Disney Channel's Shake It Up with Zendaya back in 2010, which ran until 2013.
After departing from Disney, Thorne started grabbing more mature roles. She appeared as Allison in Netflix's slasher The Babysitter.
Lele Pons is best known as an online personality and has a few acting credits. She has gained an internet following for making comedy skits through social platforms like Instagram, Vine, and YouTube. The two have since become close friends.
7 Olivia Holt & Kelli Berglund
Olivia Holt is a young up-and-coming actress who has been making a name for herself as the star of Disney XD's Kickin' It series. She has also appeared in a number of Disney's other original TV shows and movies.
In addition to acting, Holt has begun a singing carear, having just released her debut EP titled Olivia for Hollywood Records.
Much like her friend, Kelli Berglund has also been using Disney to rise through the ranks in Hollywood. As of now, the biggest title in her filmography is the Disney XD show Lab Rats, as well as the Disney Channel original movie How to Build a Better Boy.
Thanks to their ties with Disney, the two are always around each other and their bond seems to grow stronger with every encounter.
6 Nicola Peltz & Sofia Richie
Fans of the show Bates Motel will recognize Nicola Peltz as Bradley Martin. Peltz acted on the show for the first three seasons. She also may be known for playing Katara in the live action version of The Last Airbender.
In more recent years, Peltz played Tessa in Transformers: Age of Extinction. She has also been spending a lot of time with her best pal, Sofia Richie. As if the last name wasn't a dead giveaway, Richie is the youngest daughter of the legendary Lionel Richie and the sister of Nicole Richie.
Richie was the talk of the town last year for dating Justin Bieber, but it has since been revealed that the 19-year old is dating Kourtney Kardashian's former flame, 34-year old Scott Disick.
5 Michelle Williams & Busy Philipps
Michelle Williams played Jen Lindley on the hit WB teen drama Dawson's Creek from 1998 to 2003. In 2001, Busy Philipps was brought on-board for a recurring role as Audrey Liddel. Philipps and Williams met on set, hit it off instantly, and became closer and closer as the years progressed.
In 2005, when Willaims gave birth to her and Heath Ledger's daughter, she named Busy Philipps one of the godparents (alongside Jake Gyllenhaal). A year later, tragedy struck when Ledger died and Philipps became Williams's closest friend, consoling and living with Williams and her family during the painful time.
The two have since supported each other in everything-- from personal to professional problems-- and have become the best of friends.
4 Anastasia Karanikolaou & Hailey Baldwin
As the daughter of actor Stephen Baldwin, Hailey Baldwin has used her father's fame to branch into the modeling world. She has only been modeling since 2014 but she has already found some major career success-- most notably topping Maxim's Hot 100 in 2017.
Anastasia Karanikolaou is well known for being a close friend of Kylie Jenner with over 2 million Instagram followers attached to her name thanks to some appearances on Keeping Up with the Kardashians.
When she isn't affiliated with the Kardashians, Karanikolaou is partying the night away with her best friend Baldwin. As pictured above, the two are extremely close and even happen to have a very similar sense of style, which makes them look even more like twins. That is true friendship.
3 Martin Garrix & Zedd
Two of the most prolific persons in the EDM electronica scene also happen to be the best of pals. Zedd previously spent eight years in a deathcore band called Dioramic until he decided to pursue a solo career for himself in 2010.
The solo jump led to staggering results after Zedd signed with Interscope Records, where he worked alongside notable acts like Foxes and Linkin Park. He won his own Grammy Award.
Martin Garrix caught his big break in 2012 when he signed with Spinnin Records and released his hit "Animals". Since then, several polls (including DJ Mag) have named Garrix the best DJ in the world.
It was only a matter of time before these two phenomenal DJs crossed paths, and when they did, the creative chemistry sparked and they instantly became friends. Their friendship goes as far back as 2014.
2 Naomi Watts & Nicole Kidman
This may be a little known fact to those outside of Hollywood circles, but Nicole Kidman and Naomi Watts have been the best of friends for a long time.
The two became well acquainted in 1991 while on the set of Flirting. The two already knew each other beforehand, but it was on the set where their "friendship was forged," according to Watts.
Both Kidman and Watts have been best friends ever since then, often accompanying one another to red carpet events and spending loads of time together. They have been through a lot together and even have children around the same age.
Not only do the two respect each other tremendously as actresses, but they have a friendship that is as strong as a sisterhood.
1 Kylie Jenner & Gigi Hadid
In terms of friendship, Gigi Hadid has always been closely linked to Kendall Jenner, but that doesn't mean that she doesn't also have an existing friendship with Kendall's sister Kylie Jenner.
Surprisingly, both Hadid and Kylie look extremely similar, more so than Hadid and Kendall. Their close relationship started when Kendall and Hadid's sister, Bella Hadid, met each other online seven years ago through Twitter and became instant internet friends.
The then-pre-teens met up in person at a sushi place in the area and clicked right away. Eventually, Bella introduced Kendall to her sister Gigi. From there, it was not long before Kendall decided to introduce her own sister. The four have maintained close friendships ever since.
Can you think of any other celeb besties who look like they could be twins? Let us know in the comments!