<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 plays marty mcfly 's daughter in back to the future 2
who plays marty mcfly 's daughter in back to the future 2
Michael J. Fox
Michael J. Fox