"Back to the Future" stars Michael J. Fox, Christopher Lloyd and Lea Thompson reminisced about that time-travel trilogy on "Today" Wednesday -- Oct. 21, 2015, the then-future date to which Fox's Marty McFly travels in "Back to the Future Part II" (1989) and also the 30th anniversary of the original film's movie premiere.

Fox, 54, said those films and his TV show "Family Ties" "were two amazing things to have happened in one lifetime. And Marty McFly and Alex Keaton -- the chance to play both those characters is a privilege . . . I can't be grateful enough for."

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Lloyd, who turns 77 on Thursday, Oct. 22, called the trilogy "Kinda monumental. . . . Here we are 30 years later, and it doesn't seem to have lost any momentum."

Thompson, 54, thought the "crazy story" "was a perfect script. I mean, the chance to play these kind of crazy characters was amazing."