diff --git a/src/Ark.jl b/src/Ark.jl
index 8c3d8a759..6db57d548 100644
--- a/src/Ark.jl
+++ b/src/Ark.jl
@@ -27,7 +27,7 @@ include("batch.jl")
 #include("docs.jl") # doctest setup
 
 export World
-export is_alive, new_entity!, new_entities!, copy_entity!
+export is_alive, new_entity!, new_entities!, collect_entities, collect_entities!, copy_entity!
 export remove_entity!, zero_entity, is_locked, reset!
 export get_components, set_components!, has_components
 export add_components!, remove_components!
diff --git a/src/query.jl b/src/query.jl
index 2e446cc2c..57ff7f803 100644
--- a/src/query.jl
+++ b/src/query.jl
@@ -242,6 +242,24 @@ function count_entities(q::Query)
     count
 end
 
+function collect_entities!(q::Query, all_entities::AbstractVector{Entity})
+    count = count_entities(q)
+    resize!(all_entities, count)
+    offset = 1
+    for archetype in q._archetypes
+        if isempty(archetype.entities)
+            continue
+        end
+        if _contains_all(archetype.mask, q._mask) &&
+           !(q._has_excluded && _contains_any(archetype.mask, q._exclude_mask))
+            e = archetype.entities
+            unsafe_copyto!(all_entities, offset, e, 1, length(e))
+            offset += length(e)
+        end
+    end
+    return all_entities
+end
+
 """
     close!(q::Query)