diff --git a/src/Illuminate/Database/Eloquent/Casts/AsCollection.php b/src/Illuminate/Database/Eloquent/Casts/AsCollection.php
index e36b13df2184..b520b6f55525 100644
--- a/src/Illuminate/Database/Eloquent/Casts/AsCollection.php
+++ b/src/Illuminate/Database/Eloquent/Casts/AsCollection.php
@@ -2,11 +2,13 @@
 
 namespace Illuminate\Database\Eloquent\Casts;
 
+use Closure;
 use Illuminate\Contracts\Database\Eloquent\Castable;
 use Illuminate\Contracts\Database\Eloquent\CastsAttributes;
 use Illuminate\Support\Collection;
 use Illuminate\Support\Str;
 use InvalidArgumentException;
+use Laravel\SerializableClosure\SerializableClosure;
 
 class AsCollection implements Castable
 {
@@ -51,6 +53,10 @@ public function get($model, $key, $value, $attributes)
 
                 if (is_string($this->arguments[1])) {
                     $this->arguments[1] = Str::parseCallback($this->arguments[1]);
+
+                    if (! class_exists($this->arguments[1][0])) {
+                        $this->arguments[1] = @unserialize($this->arguments[1][0])->getClosure();
+                    }
                 }
 
                 return is_callable($this->arguments[1])
@@ -68,7 +74,7 @@ public function set($model, $key, $value, $attributes)
     /**
      * Specify the type of object each item in the collection should be mapped to.
      *
-     * @param  array{class-string, string}|class-string  $map
+     * @param  array{class-string, string}|class-string|Closure  $map
      * @return string
      */
     public static function of($map)
@@ -80,13 +86,15 @@ public static function of($map)
      * Specify the collection type for the cast.
      *
      * @param  class-string  $class
-     * @param  array{class-string, string}|class-string  $map
+     * @param  array{class-string, string}|class-string|Closure|null  $map
      * @return string
      */
     public static function using($class, $map = null)
     {
         if (is_array($map) && is_callable($map)) {
             $map = $map[0].'@'.$map[1];
+        } elseif ($map instanceof Closure) {
+            $map = serialize(new SerializableClosure($map));
         }
 
         return static::class.':'.implode(',', [$class, $map]);
diff --git a/src/Illuminate/Database/Eloquent/Casts/AsEncryptedCollection.php b/src/Illuminate/Database/Eloquent/Casts/AsEncryptedCollection.php
index b5912fa20b10..680ab19a0e37 100644
--- a/src/Illuminate/Database/Eloquent/Casts/AsEncryptedCollection.php
+++ b/src/Illuminate/Database/Eloquent/Casts/AsEncryptedCollection.php
@@ -2,12 +2,14 @@
 
 namespace Illuminate\Database\Eloquent\Casts;
 
+use Closure;
 use Illuminate\Contracts\Database\Eloquent\Castable;
 use Illuminate\Contracts\Database\Eloquent\CastsAttributes;
 use Illuminate\Support\Collection;
 use Illuminate\Support\Facades\Crypt;
 use Illuminate\Support\Str;
 use InvalidArgumentException;
+use Laravel\SerializableClosure\SerializableClosure;
 
 class AsEncryptedCollection implements Castable
 {
@@ -46,6 +48,10 @@ public function get($model, $key, $value, $attributes)
 
                 if (is_string($this->arguments[1])) {
                     $this->arguments[1] = Str::parseCallback($this->arguments[1]);
+
+                    if (! class_exists($this->arguments[1][0])) {
+                        $this->arguments[1] = @unserialize($this->arguments[1][0])->getClosure();
+                    }
                 }
 
                 return is_callable($this->arguments[1])
@@ -67,7 +73,7 @@ public function set($model, $key, $value, $attributes)
     /**
      * Specify the type of object each item in the collection should be mapped to.
      *
-     * @param  array{class-string, string}|class-string  $map
+     * @param  array{class-string, string}|class-string|Closure  $map
      * @return string
      */
     public static function of($map)
@@ -79,13 +85,15 @@ public static function of($map)
      * Specify the collection for the cast.
      *
      * @param  class-string  $class
-     * @param  array{class-string, string}|class-string  $map
+     * @param  array{class-string, string}|class-string|Closure|null  $map
      * @return string
      */
     public static function using($class, $map = null)
     {
         if (is_array($map) && is_callable($map)) {
             $map = $map[0].'@'.$map[1];
+        } elseif ($map instanceof Closure) {
+            $map = serialize(new SerializableClosure($map));
         }
 
         return static::class.':'.implode(',', [$class, $map]);
diff --git a/tests/Integration/Database/DatabaseCustomCastsTest.php b/tests/Integration/Database/DatabaseCustomCastsTest.php
index ec14a2bf3c49..b7cb84ba3287 100644
--- a/tests/Integration/Database/DatabaseCustomCastsTest.php
+++ b/tests/Integration/Database/DatabaseCustomCastsTest.php
@@ -215,6 +215,37 @@ public function test_as_custom_collection_with_map_callback(): void
         $this->assertInstanceOf(FluentWithCallback::class, $model->collection->first());
         $this->assertSame('bar', $model->collection->first()->foo);
     }
+
+    public function test_as_collection_with_map_using_closure()
+    {
+        $model = new TestEloquentModelWithCustomCasts();
+        $model->mergeCasts([
+            'collection' => AsCollection::of(fn ($data) => new Fluent($data)),
+        ]);
+
+        $model->setRawAttributes([
+            'collection' => json_encode([['foo' => 'bar']]),
+        ]);
+
+        $this->assertInstanceOf(Fluent::class, $model->collection->first());
+        $this->assertSame('bar', $model->collection->first()->foo);
+    }
+
+    public function test_as_custom_collection_with_map_using_closure()
+    {
+        $model = new TestEloquentModelWithCustomCasts();
+        $model->mergeCasts([
+            'collection' => AsCollection::using(CustomCollection::class, fn ($data) => new Fluent($data)),
+        ]);
+
+        $model->setRawAttributes([
+            'collection' => json_encode([['foo' => 'bar']]),
+        ]);
+
+        $this->assertInstanceOf(CustomCollection::class, $model->collection);
+        $this->assertInstanceOf(Fluent::class, $model->collection->first());
+        $this->assertSame('bar', $model->collection->first()->foo);
+    }
 }
 
 class TestEloquentModelWithCustomCasts extends Model