Mary-Kate and Ashley Olsen  have spent almost three decades in the Hollywood spotlight. The 28-year-old twins were cast as Michelle Tanner at just 9 months old, and this year, fans celebrated the 19th anniversary of the Full House  finale. In their early years, Mary-Kate and Ashley were known for their cute matching outfits, hilarious facial expressions , and many TV and movie roles. The twins have evolved from an adorable onscreen duo to popular designers. For a fun look back at their long careers, find out how many Mary-Kate and Ashley movies you've seen , then take a trip down memory lane with the ultimate MK-and-A time machine!