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16 Facts Your Probably Don't Know About Mary-Kate And Ashley Olsen

They've spent so much time together they can't remember whose memories are whose.

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1. Mary-Kate and Ashley got the part of Michelle Tanner on Full House because out of the 20 babies that auditioned, they were the only ones that didn't cry.

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2. The twins only appeared together on-screen in four episodes of Full House. In one particular episode, titled "Greek Week," Mary-Kate played Michelle Tanner's cousin Melina, and wore a black wig for the role.

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3. At six years old, the twins didn't look so identical anymore and producers picked Mary-Kate for the role of Michelle Tanner. The girls insisted, though, that they still take turns playing the character.

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4. Ashley said that their upbringing could be compared to the army because of how rigorous their schedules were.

She told Marie Claire their schedule was insane; they would "[go to] school, work, homework, fly to New York, get in at 2 in the morning, do a morning show at 5 a.m., then another one at 7, then a radio interview at 10," on an average day.
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She told Marie Claire their schedule was insane; they would "[go to] school, work, homework, fly to New York, get in at 2 in the morning, do a morning show at 5 a.m., then another one at 7, then a radio interview at 10," on an average day.

5. The girls have been fashion fans their entire lives. Michelle Tanner's wardrobe on Full House was made up of a lot of designer clothes, "including Chanel and Marc Jacobs."

ABC

Many of the pieces were adult clothes cut and tailored to fit their smaller frames.

6. All that hard work and longevity has their company, Dualstar, rolling in the dough. It's said to be worth a billion dollars.

The LLC is a production company for their movies, TV, magazine, videogame, and fashion ventures.
Getty Images

The LLC is a production company for their movies, TV, magazine, videogame, and fashion ventures.

7. Mary-Kate is left-handed, while Ashley is right-handed.

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8. While filming Full House the twins were losing their baby teeth, so they had to wear dentures so that Michelle Tanner would have a full smile.

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9. Mary-Kate and Ashley are "genetically fraternal" though they look almost exactly alike.

But, Ashley is 5 feet tall, while Mary-Kate is one inch taller, and Ashley has a freckle on her upper lip that Mary-Kate doesn't have.
Dualstar Produ / Dualstar Produ/REX/Shutterstock

But, Ashley is 5 feet tall, while Mary-Kate is one inch taller, and Ashley has a freckle on her upper lip that Mary-Kate doesn't have.

10. Full House producers credited them as one person — "Mary-Kate Ashley Olsen" — in the show's first few seasons.

ABC

They didn’t want it to get out that the character was played by two people.

11. The twins ditched their high school prom because they were asked to host the 2004 season finale of Saturday Night Live.

NBC

12. They've spent so much time together that they can't remember specifically which memories belong to whom.

They told Vogue back in 2011, "We don’t know what actually happened to whom. One of us was stung by a bee, but we can’t remember who, because we both felt it.”
Larry Busacca / Getty Images

They told Vogue back in 2011, "We don’t know what actually happened to whom. One of us was stung by a bee, but we can’t remember who, because we both felt it.”

13. But despite them both spending so much time together, only one— Mary-Kate — was nominated in 2002 for a Daytime Emmy award. She was nominated in the Outstanding Performer in a Children's or Pre-School Children's Series category for her role in So Little Time.

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14. Mary-Kate loves horses. She regularly rides and competes in the Hampton's Classic Horse Show, and in 2013 she won first place.

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15. They started their fashion line The Row because Ashley wanted to make the perfect T-shirt.

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16. Mary-Kate and Ashley share a lot of things with each other... including their star on the Hollywood Walk of Fame, which they received in 2004.

Their star also put them in the history books because they're the first set of twins ever to share a single star on the walk.
Vince Bucci / Getty Images

Their star also put them in the history books because they're the first set of twins ever to share a single star on the walk.

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