How old is Marty in Back to the Future?

Answer 1

Doc Brown (Ben Bailey Smith) is 37 years old (birthdate December 3, 1980).

*The fictional character Emmett Brown in the Back to the Future film series was posited as being 65 in 1985 (born 1920), but this was later changed to 1914 and then to 1922 in the 1991 animated series. But having spent considerable periods in other times, Doc Brown is actually older than his birthdays indicate. The actor playing Brown, Christopher Lloyd, was only 46 when the first movie was filmed, but Doc needed to be much older than 17 in 1955.

Answer 2

Marty McFly was 17, but Michael J. Fox (the actor who played him) was 23 during filming for the first movie and in his late 20's during filming for both the sequels.

Answer 3

seventeen

Answer 4

73