Chances are you wished you were a twin ever since the first time you heard Mary-Kate and Ashley Olsen team up on "Brother For Sale" or spied Tia and Tamera Mowry in matching hats. But while being a twin has formed some stars' identities from the start, there are many who haven't exactly shared the spotlight with their other halves.

Gisele and Patricia Bundchen

Sometimes, you just get lucky. Gisele Bundchen's supermodel
Sometimes, you just get lucky. Gisele Bundchen's supermodel genes exist in yet another perfect human being-- her twin sister, Patricia. There are actually five Bundchen sisters in total, all of them Brazilian beauties. Patricia did some modeling like her sis, but she works mainly as Gisele's manager. (Credit: Getty Images/AFP/Nelson Almeida)

Scarlett and Hunter Johansson

Sorry, guys, Scarlett Johansson's twin is a dude.
Sorry, guys, Scarlett Johansson's twin is a dude. He played a minor role alongside Scarlett in 1996 movie "Manny & Lo," and has been involved in political endeavors, including working as a community organizer for Manhattan Borough President Scott Stringer until 2008, and as a campaign organizer for President Barack Obama. (Credit: Getty Images/Francois Durand)

Ashton and Michael Kutcher

Surprised Ashton Kutcher has a twin? So was
Surprised Ashton Kutcher has a twin? So was his mom.
Diane Kutcher thought she was having only one son when she gave birth to the two boys. Michael, who was born weighing just 4 pounds to Ashton's 10.5, has become a motivational speaker. He was diagnosed with cerebral palsy at age 3 and got married earlier this year with both Ashton and Mila Kunis in attendance. (Credit: Getty Images/Frazer Harrison)

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Aaron and Angel Carter

We all know Aaron and Nick Carter, but
We all know Aaron and Nick Carter, but Aaron has a twin sister, Angel, who works as a model. Aaron walked her down the aisle at her February 2014 wedding, from which Nick was noticeably absent. (Credit: Getty Images/Stephen Lovekin)

Alanis and Wade Morissette

Alanis Morissette's twin, Wade, is the lesser-known sibling,
Alanis Morissette's twin, Wade, is the lesser-known sibling, but he has musical talents of his own. Plus, he's an author and yoga instructor. (Credit: Getty Images/Imeh Akpanudosen)

Kiefer and Rachel Sutherland

While Kiefer Sutherlamd has been making his living
While Kiefer Sutherlamd has been making his living on-screen, his twin sis has been working as a production manager on TV series and movies including "Saving Hope," "Lost Girl" and "Rookie Blue." (Credit: Getty Images/Alberto E. Rodriguez)

Vin Diesel and Paul Vincent

"The Fast and the Furious" star, born Mark Vincent, grew up with his twin brother, Paul, in Greenwich Village. Paul is a film editor, and has way more hair than his famous brother. (Getty Images/Kevin Winter)

TWINS WE KNOW AND LOVE

Mary-Kate and Ashley Olsen

From
From "Full House" to their sing-along VHS tapes to their fashion lines today, Mary-Kate and Ashley have done it all together, successfully building an empire off their twin status. (Credit: Getty Images/Taylor Hill)

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Tia and Tamera Mowry

Did the
Did the "Sister, Sister" theme song just pop into your head? Yeah, us too. After starring in their hit sitcom as teens, Tia and Tamera Mowry went on to study psychology at Pepperdine University and then continued to take on TV and film roles, including "The Hot Chick" and "Seventeen Again." Their own reality show, "Tia & Tamera," ran on the Style Network from 2011 to 2013. (Credit: Getty Images/Jason Merritt)

Dylan and Cole Sprouse

The Sprouse Bros. got their start in Adam
The Sprouse Bros. got their start in Adam Sandler's "Big Daddy," but they really hit the famous twin scene thanks to Disney Channel series "The Suite Life of Zack & Cody." (Credit: Getty Images/Tim Whitby)

Joel and Benji Madden

They may look tough, but Joel and Benji
They may look tough, but Joel and Benji are the picture of brotherly love. The twins not only managed to form a famous band, "Good Charlotte," without eventually hating each other, but they've worked on many other projects together and in 2013 released a duet called "Brother." Aww. (Credit: Getty Images/Scott Barbour)

Tiki and Ronde Barber

As New Yorkers, we're partial to former Giants
As New Yorkers, we're partial to former Giants running back Tiki Barber, but both Barber twins are stand-up guys with serious athletic talent, even if Ronde spent his career with the Tampa Bay Buccaneers. (Credit: Getty Images/Al Messerschmidt)