Michael J. Fox is recalling the time in his career when he booked the two roles that many know him for now. In his new book, "Future Boy," Fox tells the story about when he starred in the television sitcom "Family Ties" and the blockbuster film " Back to the Future " at the same time. "It was an amazing time," Fox told "Good Morning America" co-host George Stephanopoulos. Fox's three-month journey of starring in both projects almost didn't happen because the creator of "Family Ties" didn't want to risk losing Fox, who starred as Alex P. Keaton on the hit TV show. At the time, actor Eric Stoltz was cast as the iconic role of Marty McFly, but director Steven Spielberg wanted Fox as the lead in his film, which would go on to become a trilogy. "They were shooting with another actor and it hadn

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