5. Marlene McFly in “Back to the Future II” is actually Michael J. Fox
Were you aware of the fact that Michael J. Fox plays two roles in Back to the Future II? Not only does he play the role of the protagonist, Marty McFly, but Michael also plays as Marty´s daughter, Marlene McFly. Apart from his role in the Back to the Future film series, Michael J. Fox can also be seen in Mars Attacks, Coldblooded, For Love or Money, and Annie etc. He was also the voice of Stuart Little in the Stuart Little film series.