diff --git a/src/actor.h b/src/actor.h
index f357e6c9f..9123da4fa 100644
--- a/src/actor.h
+++ b/src/actor.h
@@ -1035,6 +1035,8 @@ public:
 
 	// When was this actor spawned? (relative to the current level)
 	int GetLevelSpawnTime() const;
+	// How many ticks passed since this actor was spawned?
+	int GetAge() const;
 
 // info for drawing
 // NOTE: The first member variable *must* be snext.
diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index a1e7cbac8..67d934060 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -8085,6 +8085,24 @@ DEFINE_ACTION_FUNCTION(AActor, GetLevelSpawnTime)
 	ACTION_RETURN_INT(self->GetLevelSpawnTime());
 }
 
+//==========================================================================
+//
+// AActor :: GetAge
+//
+// Returns the number of ticks passed since this actor was spawned.
+//
+//==========================================================================
+int AActor::GetAge() const
+{
+	return level.totaltime - SpawnTime;
+}
+
+DEFINE_ACTION_FUNCTION(AActor, GetAge)
+{
+	PARAM_SELF_PROLOGUE(AActor);
+	ACTION_RETURN_INT(self->GetAge());
+}
+
 //---------------------------------------------------------------------------
 //
 // PROP A_RestoreSpecialPosition
diff --git a/wadsrc/static/zscript/actor.txt b/wadsrc/static/zscript/actor.txt
index 70ea25e91..48172b821 100644
--- a/wadsrc/static/zscript/actor.txt
+++ b/wadsrc/static/zscript/actor.txt
@@ -710,6 +710,7 @@ class Actor : Thinker native
 	native clearscope double GetCameraHeight() const;
 	native clearscope double GetGravity() const;
 	native clearscope int GetLevelSpawnTime() const;
+	native clearscope int GetAge() const;
 
 	native bool CheckClass(class<Actor> checkclass, int ptr_select = AAPTR_DEFAULT, bool match_superclass = false);
 	native void AddInventory(Inventory inv);