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 k**wn 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 ****** you've seen, then take a trip down memory lane with the Ultimate MK-and-A Time machine!