diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.8.4.0
+
+- Added builtin `apply`, making it possible to pass argument lists as arrays
+
 ## 0.8.3.0
 
 - Added builtin `regex` module for POSIX regular expressions support
diff --git a/ginger.cabal b/ginger.cabal
--- a/ginger.cabal
+++ b/ginger.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                ginger
-version:             0.8.3.0
+version:             0.8.4.0
 synopsis:            An implementation of the Jinja2 template language in Haskell
 description:         Ginger is Jinja, minus the most blatant pythonisms. Wants
                      to be feature complete, but isn't quite there yet.
@@ -44,7 +44,7 @@
                , http-types >= 0.8 && (< 0.11 || >= 0.12)
                , mtl >= 2.2
                , parsec >= 3.0
-               , regex-tdfa >=1.2.3.1 && <=1.3
+               , regex-tdfa >=1.2.3 && <=1.3
                , safe >= 0.3
                , scientific >= 0.3
                , text
diff --git a/src/Text/Ginger/Run.hs b/src/Text/Ginger/Run.hs
--- a/src/Text/Ginger/Run.hs
+++ b/src/Text/Ginger/Run.hs
@@ -130,6 +130,7 @@
     , ("abs", fromFunction . unaryNumericFunc 0 $ Prelude.abs)
     , ("any", fromFunction gfnAny)
     , ("all", fromFunction gfnAll)
+    , ("apply", fromFunction gfnApply)
     -- TODO: batch
     , ("capitalize", fromFunction . variadicStringFunc $ mconcat . Prelude.map capitalize)
     , ("ceil", fromFunction . unaryNumericFunc 0 $ Prelude.fromIntegral . Prelude.ceiling)
diff --git a/src/Text/Ginger/Run/Builtins.hs b/src/Text/Ginger/Run/Builtins.hs
--- a/src/Text/Ginger/Run/Builtins.hs
+++ b/src/Text/Ginger/Run/Builtins.hs
@@ -156,6 +156,16 @@
 inDict needle haystack =
   isJust $ lookupKey (asText needle) haystack
 
+gfnApply :: Monad m => Function (Run p m h)
+gfnApply [] = return def
+gfnApply [_] = return def
+gfnApply ((_, fg):(_,a):xs) =
+  case asFunction fg of
+    Nothing -> throwHere $ ArgumentsError (Just "apply") "Tried to call something that isn't a function"
+    Just f ->
+      let args = (fmap (Nothing,) . fromMaybe [] . asList $ a) ++ xs
+      in f args
+
 gfnEquals :: Monad m => Function m
 gfnEquals [] = return $ toGVal True
 gfnEquals [x] = return $ toGVal True
diff --git a/test/Text/Ginger/SimulationTests.hs b/test/Text/Ginger/SimulationTests.hs
--- a/test/Text/Ginger/SimulationTests.hs
+++ b/test/Text/Ginger/SimulationTests.hs
@@ -952,6 +952,12 @@
                     "{% if 'foo'|in({'bar': false, 'baz': false, 'fooq': false}) %}yes{% else %}no{% endif %}"
                     "no"
             ]
+        , testGroup "\"apply\""
+            [ testCase "sum" $ do
+                mkTestHtml [] []
+                  "{{ apply(sum, [1,2,3]) }}"
+                  "6"
+            ]
         ]
     , testGroup "Setting variables"
         [ testCase "plain" $ do