Mary-Kate Olsen and Ashley Olson have both been in acting since they were infants. Their careers got their start on the television series full house. They both played the same character, Michelle Tanner. Ever since the end of full house, Mary-Kate and Ashley have been agressive in merchandising their image, and became popular figures in the preteen market. Their last movie to get them out of a kid orientated market, New York Minute, was for them an unfortunate flop, but we don't think we have seen the last of them yet.