Cast Age Comparison
| Actor | Character | Actor Age | Char Age | Conf | Diff | Source/Hints | |
|---|---|---|---|---|---|---|---|
 |
Michael J. Fox | Marty McFly | 24 | 17 | C4 | +7 | Futurepedia: DOB June 12, 1968 (cited from 'Hard Time Part 3'). Film date Nov 5, 1985 = 17 years old |
 |
Christopher Lloyd | Emmett Brown | 46 | 65 | C3 | -19 | Futurepedia: Born 1920 per BTTF novelization. Note: video game says 1914, animated series says 1922 - conflicting sources • ScreenRant confirms BTTF novels state Doc was born 1920, making him 65 in 1985 |
 |
Crispin Glover | George McFly | 21 | 17 | C4 | +4 | Futurepedia: DOB April 1, 1938 (visible on tombstone in BTTF2). Age 17 on Nov 5, 1955 |
 |
Lea Thompson | Lorraine Baines | 24 | 17 | C3 | +7 | Futurepedia: Born 1938 in Hill Valley. Age 17 in 1955 scenes |
 |
Claudia Wells | Jennifer Parker | 18 | 17 | C4 | +1 | Futurepedia: DOB Oct 29, 1967 (derived from BTTF2 where Officer Foley states she is 47 in 2015) |
Actor Age
Actor’s real age when the production was filmed or released
Char Age
The character’s age as stated or implied in the story
Diff
Difference between actor age and character age (green = close, red = far apart)
Source/Hints
Where the character age was found or how it was inferred
Confidence Scale
C5
Canonical — age explicitly stated in the production
C4
Canonical — derived from dates or events in the story
C3
Strong secondary source (script, novelization, creator interview)
C2
Inferred range — estimated from context clues
C1
Unknown — no reliable age information found