There, Marty encounters his Irish-born great-great-grandparents, Seamus and Maggie McFly. Seamus is portrayed by Fox, rounding out the several characters the actor plays in the Back to the Future ...

Marlene McFly and Seamus McFly. Ben Stiller played brothers in The Cable Guy, and Alec Guinness memorably played the entire d’Ascoyne family in Kind Hearts and Coronets. Michael J Fox and ...