Credit: Otero/ WENN

Today, June 13, 2012, marks the 26th birthday of America's favorite twins. Yep, that's right:  Mary-Kate and Ashley Olsen are now heading into the back half of their 20s. It seems like just yesterday they were still lisping their way through Full House.

In honor of the big day, we've taken a look back at the girls through the years. So check them out at 6, 16, and now 26. Do you like the twins best as adorable kiddies, sultry teens, or sophisticated twentysomethings?

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