<P> The production team behind Full House did not want people to know that Michelle was played by a set of twins , so the girls were credited as `` Mary - Kate Ashley Olsen '' for most of the show 's run ( making it appear as if a single actress had the first name Mary - Kate and the middle name Ashley ) . Although the two were credited separately as `` Mary - Kate Olsen and Ashley Olsen '' during the closing credits in the series ' first season ( they were not officially added to the opening title sequence until season two but were credited in the syndicated versions of the season one opening titles ) , it was not until the eighth and final season that the twins were credited as `` Mary - Kate and Ashley Olsen '' in the opening titles . Despite the fact that the Olsens are fraternal twins , their physical appearances were nonetheless similar enough so that few could tell the difference between the two over the course of the show 's run . In season one , Mary - Kate was used more often due to the fact Ashley cried when she was put on set for a scene . </P>
<P> The production team behind Full House did not want people to know that Michelle was played by a set of twins , so the girls were credited as `` Mary - Kate Ashley Olsen '' for most of the show 's run ( making it appear as if a single actress had the first name Mary - Kate and the middle name Ashley ) . Although the two were credited separately as `` Mary - Kate Olsen and Ashley Olsen '' during the closing credits in the series ' first season ( they were not officially added to the opening title sequence until season two but were credited in the syndicated versions of the season one opening titles ) , it was not until the eighth and final season that the twins were credited as `` Mary - Kate and Ashley Olsen '' in the opening titles . Despite the fact that the Olsens are fraternal twins , their physical appearances were nonetheless similar enough so that few could tell the difference between the two over the course of the show 's run . In season one , Mary - Kate was used more often due to the fact Ashley cried when she was put on set for a scene . </P>
did mary kate or ashley play more on full house
did mary kate or ashley play more on full house
Mary - Kate
Mary - Kate