Cast Age Comparison
| Actor | Character | Actor Age | Char Age | Conf | Diff | Source/Hints | |
|---|---|---|---|---|---|---|---|
 |
Jaeden Martell | Bill Denbrough | 14 | 13 | C4 | +1 | Stephen King Wiki: Bill born January 4, 1976 in 2017 film |
 |
Jeremy Ray Taylor | Ben Hanscom | 14 | 12-14 | C2 | +1 | Losers Club members described as preteens, same age group as Bill/Beverly |
 |
Sophia Lillis | Beverly Marsh | 15 | 13 | C4 | +2 | Stephen King Wiki: Beverly born 1976 in 2017 film |
 |
Finn Wolfhard | Richie Tozier | 14 | 12-14 | C2 | +1 | Losers Club members described as preteens, same age group as Bill/Beverly |
 |
Chosen Jacobs | Mike Hanlon | 16 | 12-14 | C2 | +3 | Losers Club members described as preteens, same age group as Bill/Beverly |
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