I can't be the only one who's wondered about this?

While fans of Mary-Kate and Ashley Olsen may have been able to tell them apart as they got older, back in their Full House days, it was a bit trickier.

Mary-Kate and Ashley Olsen were famous child stars in the '90s. In addition to Full House, the twins created a billion-dollar media and merchandising empire. After retiring from acting in the 2000s, ...

Ashley Olsen rose to fame alongside twin sister Mary-Kate Olsen with roles in Full House, Passport to Paris, New York Minute and more — but she has since stepped back from acting. The sisters got ...

Mary-Kate and Ashley Olsen: twin sisters born in California on July 13, 1986. In the series 'Full House,' they took turns ...

The Full House cast formed a strong connection to Mary-Kate Olsen and Ashley Olsen almost immediately after the twins first appeared on the hit sitcom at 6 months old. Mary-Kate and Ashley starred on ...

The Olsen twins appeared on the show from the first season, growing up as they shared the role on Full House ...

Jodie Sweetin shared an update on where she stands with her Full House co-stars Mary-Kate and Ashley Olsen after their “very different” experiences working on the sitcom together as children. Sweetin ...

Jodie Sweetin says Mary-Kate and Ashley Olsen’s absence from Fuller House should not be treated as proof of a feud. The ...