diff --git a/src/Modifiers/CoreModifiers.php b/src/Modifiers/CoreModifiers.php
index 31b3cefb9b..175751e385 100644
--- a/src/Modifiers/CoreModifiers.php
+++ b/src/Modifiers/CoreModifiers.php
@@ -2896,6 +2896,23 @@ public function where($value, $params)
         return $collection->values()->all();
     }
 
+    /**
+     * Filters the data by a given key / value pair.
+     *
+     * @param  array  $value
+     * @param  array  $params
+     * @return array
+     */
+    public function whereIn($value, $params)
+    {
+        $key = Arr::get($params, 0);
+        $arr = Arr::get($params, 1);
+
+        $collection = collect($value)->whereIn($key, $arr);
+
+        return $collection->values()->all();
+    }
+
     /**
      * Attempts to prevent widows in a string by adding
      * <nobr> tags between the last two words of each paragraph.
diff --git a/tests/Antlers/Runtime/CoreModifiersTest.php b/tests/Antlers/Runtime/CoreModifiersTest.php
index 03fc062a60..014c48ae37 100644
--- a/tests/Antlers/Runtime/CoreModifiersTest.php
+++ b/tests/Antlers/Runtime/CoreModifiersTest.php
@@ -238,6 +238,27 @@ public function test_where()
         $this->assertSame('DominionNetrunner', $this->resultOf($template));
     }
 
+    public function test_where_in()
+    {
+        $template = <<<'EOT'
+{{ complex | where_in("last_name", ["Zebra", "Bravo"]) }}{{ first_name }}{{ /complex }}
+EOT;
+
+        $this->assertSame('ZealousBlathering', $this->resultOf($template));
+
+        $template = <<<'EOT'
+{{ complex where_in="{"last_name"}|{["Zebra", "Bravo"]}" }}{{ first_name }}{{ /complex }}
+EOT;
+
+        $this->assertSame('ZealousBlathering', $this->resultOf($template));
+
+        $template = <<<'EOT'
+{{ complex | where_in("last_name", "Zebra") }}{{ first_name }}{{ /complex }}
+EOT;
+
+        $this->assertSame('Zealous', $this->resultOf($template));
+    }
+
     public function test_unique()
     {
         $this->assertSame('zebra, hippo, hyena, giraffe', $this->resultOf('{{ checklist | unique | list }}'));