diff --git a/src/actors.js b/src/actors.js
index e30fe80..5ab1c52 100644
--- a/src/actors.js
+++ b/src/actors.js
@@ -71,8 +71,12 @@ export function curateActor(actor, context = {}) {
 			name: actor.entity.name,
 		},
 		...Object.fromEntries(Object.entries(keyMap).map(([key, entryKey]) => [key, actor[entryKey]])),
-		ageFromBirth: actor.date_of_birth && differenceInYears(Date.now(), actor.date_of_birth),
-		ageThen: context.sceneDate && actor.date_of_birth && differenceInYears(context.sceneDate, actor.date_of_birth),
+		ageFromBirth: actor.date_of_birth && actor.date_of_birth.getFullYear() > 1
+			? differenceInYears(Date.now(), actor.date_of_birth)
+			: null,
+		ageThen: context.sceneDate && actor.date_of_birth && actor.date_of_birth.getFullYear() > 1
+			? differenceInYears(context.sceneDate, actor.date_of_birth)
+			: null,
 		bust: actor.bust,
 		cup: actor.cup,
 		waist: actor.waist,