Mary-Kate Olsen and Ashley Fuller Olsen, also known as the Olsen twins as a duo, are American fashion designers and former actresses. The twins made their acting debut as infants playing Michelle ...

The list of famous twins is quite short. And the list of those who babysat other famous twins is even shorter. Mary-Kate and Ashley Olsen, 39, have been in Hollywood for their entire lives.

The sisters would tag along with their mother to the '90s sitcom set, which led to the twins being asked to babysit stars Mary-Kate and Ashley Olsen, who were seven years younger.

June 13, 2014 -- intro: Happy birthday, Mary-Kate and Ashley Olsen! Today, our favorite twins turned 28. To celebrate, we took a trip down memory lane and counted down 28 facts about the famous ...

Mary-Kate Olsen was spotted in the Hamptons on a rare outing wearing sweatpants. The former child star is notoriously private and rarely steps out in public. Olsen founded The Row with her twin ...

Sister, Sister did get its chance and was a hit soon after its premiere. Just as they got excited, ABC came back and said they were dropping the show as they pivoted away from as much family ...

Whether they played a singular role like Mary-Kate and Ashley Olsen did in Full House, or how Tia and Tamera Mowry acted alongside each other in Sister, Sister, it was twin city.

Tia Mowry shared that she and her twin sister Tamera Mowry babysat Mary-Kate and Ashley Olsen on the Full House set when their brother Tahj Mowry appeared on the show as Michelle's friend Teddy.