Mary-Kate and Ashley Olsen aren't as similar as you think!

The famous twins stopped by Friday's episode of "The Ellen DeGeneres Show," where they were quizzed on what sets them apart in a game called, "Mary-Kate or Ashley?"

Ellen asked them a series of questions, and they had to flip a paddle to show which sister fit the question best.

Some of the things that they had to answer were: who is the best singer, who got kissed first, who is the messiest and more! 

PHOTOS: Can You Tell the Olsen Twins Apart?

So, let's talk about that kiss.

When DeGeneres asked the 27-year-old fashion designers about their first romantic rendezvous, they actually couldn't remember! 

"Do you remember your first kiss?" the talk show host asked. "Um, no," Mary-Kate replied. "Someone just asked me that, and I was embarrassed that I didn't have a fabulous story."

Well, she may not remember her first, but MK certainly seems smitten with her fiance Olivier Sarkozy. It was hard to ignore the giant rock on that finger!

Check out the video above to learn more about the Olsens!


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