Mary-Kate and Ashley Olsen won America’s heart as little Michelle Tanner on Full House, ... or comedic timing — it was baby wrangler Adria Later pulling the strings of the doll-like duo.

They are like collectors' dolls, big-eyed and pocket-size. They are two halves of one whole, for that yin-yang split in all of us. Ashley Olsen is our girlie-girl; Mary-Kate is our tomboy.

Mary-Kate and Ashley Olsen are the definition of twinning! ... Once upon a time, in fact, you could tell the Mary-Kate doll from the Ashley doll by which one had a pearly white grin.