Did you know the iconic Barbie doll actually has a last name!

SAO PAULO, BRAZIL - NOVEMBER 03: A Barbie Doll is displayed in the Barbie Experience during Sao Paulo Fashion Week Winter 2015 at Porao das Artes on November 3, 2014 in Sao Paulo, Brazil. (Photo by Studio Fernanda Calfat/Getty Images)

Barbie has been such an icon for little girls for over 50 years. But did you know she actually has a last name!

On April 10th, also known as National Siblings Day. Barbie tweeted out a picture with her sisters and It was the fact that her tweet revealed their LAST name.

“Happy #SiblingsDay, from the Roberts sisters!” Barbie’s tweeted.

Barbie’s last name is Roberts, and her full name is 'Barbara Millicent Roberts', but she goes by Barbie for short.

Ken also has a last name. He goes by Ken Carson.

How did we not know this?

Barbie's Twitter followers went crazy!

Also, another fun fact: Did you know that Barbie has had over 40 pets!

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