MICHAEL J. Fox admitted his legendary roles in Back To The Future and Family Ties "meant the most to him" as the actor hints at retirement.
The 59-year-old made the comments while appearing on Thursday's episode of .
During the latest episode of the talk show, host asked the actor: "What acting role has meant the most to you?"
responded: “I’d say it’s three. Alex Keaton, Marty McFly and Louis Canning on Good Wife. Those three characters.”
The actor memorably played Alex Keaton in the NBC sitcom Family Ties, which aired from 1982-1989.
Many fans know him for his role as Marty McFly in the three Back To The Future Films, which came out in 1985, 1989 and 1990.
The final role Michael said had a special place in his heart was attorney Louis Canning on The Good Wife.
The recurring role was featured in 26 episodes of the CBS drama, while he also reprised the character for two episodes of the CBS All Access original series The Good Fight.
Michael's appearance on WWHL comes after he as he struggles to learn lines due to his Parkinson's diagnosis.
He was diagnosed with Parkinson's - a long-term degenerative disorder of the nervous system - at the age of 29 in 1991, but kept his condition secret for seven years.
Despite being told by doctors at the time that he only had ten years of working left before his condition would have deteriorated too much, he continued to have a successful career in Hollywood.
He reflected on the longevity of his career in his new book No Time Like The Future: An Optimist Considers Mortality.
In an extract obtained by , the actor wrote: "There are reasons for my lapses in memorization."
Michael continued: "Be they age, cognitive issues with the disease, distraction from the constant sensations of Parkinson’s, or lack of sensation because of the spine... but I read it as a message, an indicator.
"There is a time for everything, and my time of putting in a twelve-hour workday, and memorizing seven pages of dialogue, is best behind me. At least for now."
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The father-of-four then admitted that he has accepted this may be the "end of my acting career."
Michael wrote that he's considering "entering a second retirement," adding: "That could change, because everything changes. But if this is the end of my acting career, so be it."
He's been married Tracy Pollan since 1988 and they share son Sam, 31, twins Aquinnah and Schuyler, both 25, and daughter Esmé, 19.