Michael J Fox has opened up about his marriage to wife of 35 years, Tracy Pollan, as he gave a rare insight into his personal life. The iconic Back to The Future actor detailed how only “one person” knows the real him as he reflected on his marriage. Fox, 62, was asked about the secret to his long-lasting marriage, and admitted: “We just make it up as we go along.” Speaking to PEOPLE, he continued: “It’s interesting, being married for 35 years. Yeah. I mean, the joke is you say I’ve been married 35 years, and it’s [been] the best 35 years of my life so think about that one for a second.” The C…