diff --git a/config/sets/level/up-to-wp-6.6.php b/config/sets/level/up-to-wp-6.6.php
new file mode 100644
index 0000000..f47cf0e
--- /dev/null
+++ b/config/sets/level/up-to-wp-6.6.php
@@ -0,0 +1,9 @@
+<?php
+
+use Fsylum\RectorWordPress\Set\WordPressLevelSetList;
+use Fsylum\RectorWordPress\Set\WordPressSetList;
+use Rector\Config\RectorConfig;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->sets([WordPressSetList::WP_6_6, WordPressLevelSetList::UP_TO_WP_6_5]);
+};
diff --git a/config/sets/wp-6.6.php b/config/sets/wp-6.6.php
new file mode 100644
index 0000000..c9ee686
--- /dev/null
+++ b/config/sets/wp-6.6.php
@@ -0,0 +1,20 @@
+<?php
+
+use Fsylum\RectorWordPress\Rules\FuncCall\ReturnFirstArgumentRector;
+use Rector\Config\RectorConfig;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->import(__DIR__ . '/../config.php');
+
+    $rectorConfig->ruleWithConfiguration(ReturnFirstArgumentRector::class, [
+        'wp_interactivity_process_directives_of_interactive_blocks',
+        'wp_render_elements_support',
+    ]);
+
+    /*
+     * TODO: these are not handled currently
+     *
+     * METHODS
+     * - WP_Theme_JSON::set_spacing_sizes
+     */
+};
diff --git a/src/Set/WordPressLevelSetList.php b/src/Set/WordPressLevelSetList.php
index b0afbba..e66b7b5 100644
--- a/src/Set/WordPressLevelSetList.php
+++ b/src/Set/WordPressLevelSetList.php
@@ -55,4 +55,5 @@ final class WordPressLevelSetList implements SetListInterface
     public const UP_TO_WP_6_3  = __DIR__ . '/../../config/sets/level/up-to-wp-6.3.php';
     public const UP_TO_WP_6_4  = __DIR__ . '/../../config/sets/level/up-to-wp-6.4.php';
     public const UP_TO_WP_6_5  = __DIR__ . '/../../config/sets/level/up-to-wp-6.5.php';
+    public const UP_TO_WP_6_6  = __DIR__ . '/../../config/sets/level/up-to-wp-6.6.php';
 }
diff --git a/src/Set/WordPressSetList.php b/src/Set/WordPressSetList.php
index 1bc48ea..3505e5c 100644
--- a/src/Set/WordPressSetList.php
+++ b/src/Set/WordPressSetList.php
@@ -55,4 +55,5 @@ final class WordPressSetList implements SetListInterface
     public const WP_6_3  = __DIR__ . '/../../config/sets/wp-6.3.php';
     public const WP_6_4  = __DIR__ . '/../../config/sets/wp-6.4.php';
     public const WP_6_5  = __DIR__ . '/../../config/sets/wp-6.5.php';
+    public const WP_6_6  = __DIR__ . '/../../config/sets/wp-6.6.php';
 }
diff --git a/tests/Rector/Sets/Level/UpToWp65/UpToWp65Test.php b/tests/Rector/Sets/Level/UpToWp66/UpToWp66Test.php
similarity index 88%
rename from tests/Rector/Sets/Level/UpToWp65/UpToWp65Test.php
rename to tests/Rector/Sets/Level/UpToWp66/UpToWp66Test.php
index c36f348..7245df5 100644
--- a/tests/Rector/Sets/Level/UpToWp65/UpToWp65Test.php
+++ b/tests/Rector/Sets/Level/UpToWp66/UpToWp66Test.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Fsylum\RectorWordPress\Tests\Rector\Sets\Level\UpToWp65;
+namespace Fsylum\RectorWordPress\Tests\Rector\Sets\Level\UpToWp66;
 
 use Iterator;
 use PHPUnit\Framework\Attributes\DataProvider;
@@ -9,7 +9,7 @@
 /**
  * @internal
  */
-final class UpToWp65Test extends AbstractRectorTestCase
+final class UpToWp66Test extends AbstractRectorTestCase
 {
     #[DataProvider('provideData')]
     public function test(string $filePath): void
@@ -24,6 +24,6 @@ public static function provideData(): Iterator
 
     public function provideConfigFilePath(): string
     {
-        return __DIR__ . '/../../../../../config/sets/level/up-to-wp-6.5.php';
+        return __DIR__ . '/../../../../../config/sets/level/up-to-wp-6.6.php';
     }
 }
diff --git a/tests/Rector/Sets/Level/UpToWp65/test_fixture.php.inc b/tests/Rector/Sets/Level/UpToWp66/test_fixture.php.inc
similarity index 99%
rename from tests/Rector/Sets/Level/UpToWp65/test_fixture.php.inc
rename to tests/Rector/Sets/Level/UpToWp66/test_fixture.php.inc
index 1a56952..c4dfb54 100644
--- a/tests/Rector/Sets/Level/UpToWp65/test_fixture.php.inc
+++ b/tests/Rector/Sets/Level/UpToWp66/test_fixture.php.inc
@@ -368,6 +368,10 @@ $class2 = new WP_Site_Icon;
 $class1->create_attachment_object('foo', 1);
 $class2->create_attachment_object('foo', 1);
 
+// 6.6
+$foo = wp_interactivity_process_directives_of_interactive_blocks($bar);
+$foo = wp_render_elements_support($bar);
+
 ?>
 -----
 <?php
@@ -690,4 +694,8 @@ $class2 = new WP_Site_Icon;
 \wp_copy_parent_attachment_properties('foo', 1, 'custom-header');
 \wp_copy_parent_attachment_properties('foo', 1, 'site-icon');
 
+// 6.6
+$foo = $bar;
+$foo = $bar;
+
 ?>
diff --git a/tests/Rector/Sets/Wp66/Wp66Test.php b/tests/Rector/Sets/Wp66/Wp66Test.php
new file mode 100644
index 0000000..dfcb137
--- /dev/null
+++ b/tests/Rector/Sets/Wp66/Wp66Test.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace Fsylum\RectorWordPress\Tests\Rector\Sets\Wp66;
+
+use Iterator;
+use PHPUnit\Framework\Attributes\DataProvider;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+
+/**
+ * @internal
+ */
+final class Wp66Test extends AbstractRectorTestCase
+{
+    #[DataProvider('provideData')]
+    public function test(string $filePath): void
+    {
+        $this->doTestFile($filePath);
+    }
+
+    public static function provideData(): Iterator
+    {
+        return self::yieldFilesFromDirectory(__DIR__);
+    }
+
+    public function provideConfigFilePath(): string
+    {
+        return __DIR__ . '/../../../../config/sets/wp-6.6.php';
+    }
+}
diff --git a/tests/Rector/Sets/Wp66/test_fixture.php.inc b/tests/Rector/Sets/Wp66/test_fixture.php.inc
new file mode 100644
index 0000000..53d0213
--- /dev/null
+++ b/tests/Rector/Sets/Wp66/test_fixture.php.inc
@@ -0,0 +1,13 @@
+<?php
+
+$foo = wp_interactivity_process_directives_of_interactive_blocks($bar);
+$foo = wp_render_elements_support($bar);
+
+?>
+-----
+<?php
+
+$foo = $bar;
+$foo = $bar;
+
+?>