<P> Marty ( Jr . ) and Marlene McFly ( both portrayed by Michael J. Fox ) are Marty McFly and Jennifer Parker 's future fraternal twin son and daughter in Part II . </P>
<P> Marty ( Jr . ) and Marlene McFly ( both portrayed by Michael J. Fox ) are Marty McFly and Jennifer Parker 's future fraternal twin son and daughter in Part II . </P>
who played marty 's daughter in back to the future 2
who played marty 's daughter in back to the future 2
Michael J. Fox
Michael J. Fox