<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 marlene mcfly in back to the future
who played marlene mcfly in back to the future
Michael J. Fox
Michael J. Fox