Cast Age Comparison
| Actor | Character | Actor Age | Char Age | Conf | Diff | Source/Hints | |
|---|---|---|---|---|---|---|---|
 |
Ralph Fiennes | Dr. Ian Kelson | 63 | - | C1 | ||
 |
Jack O'Connell | Sir Lord Jimmy Crystal | 35 | 36 | C3 | -1 | 28 Days Later Wiki: Lists Jimmy Crystal as 36 years old. Backstory describes him fleeing as a child (age ~8) during 2002 outbreak. |
 |
Alfie Williams | Spike | 15 | 12 | C3 | +3 | 28 Days Later Wiki: 'Spike, Jamie and Isla's 12-year-old son'. Born ~16 years after outbreak. • Common Sense Media: 'The main character is 12-year-old Spike.' |
 |
Erin Kellyman | Jimmy Ink | 27 | 34-38 | C2 | -9 | Out.com interview: Kellyman states character 'has been part of that since she was maybe like 8 years old' referring to the cult that formed after the 2002 outbreak. |
 |
Chi Lewis-Parry | Samson | 42 | 37-42 | C2 | +2 | 28 Days Later Wiki: Lists Samson as 'Late 30's'. States he was 'a teenager riding on a train before the Original Outbreak'. |
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