diff --git a/Normalizer/ObjectNormalizer.php b/Normalizer/ObjectNormalizer.php
index a8bf91899..53c1e4cb1 100644
--- a/Normalizer/ObjectNormalizer.php
+++ b/Normalizer/ObjectNormalizer.php
@@ -108,9 +108,9 @@ protected function extractAttributes(object $object, string $format = null, arra
         }
 
         // properties
-        $propertyValues = (array) $object;
+        $propertyValues = !method_exists($object, '__get') ? (array) $object : null;
         foreach ($reflClass->getProperties() as $reflProperty) {
-            if (!\array_key_exists($reflProperty->name, $propertyValues)) {
+            if (null !== $propertyValues && !\array_key_exists($reflProperty->name, $propertyValues)) {
                 if ($reflProperty->isPublic()
                     || ($reflProperty->isProtected() && !\array_key_exists("\0*\0{$reflProperty->name}", $propertyValues))
                     || ($reflProperty->isPrivate() && !\array_key_exists("\0{$reflProperty->class}\0{$reflProperty->name}", $propertyValues))
diff --git a/Normalizer/PropertyNormalizer.php b/Normalizer/PropertyNormalizer.php
index fffbc2030..fb0d29564 100644
--- a/Normalizer/PropertyNormalizer.php
+++ b/Normalizer/PropertyNormalizer.php
@@ -101,13 +101,15 @@ protected function extractAttributes(object $object, string $format = null, arra
     {
         $reflectionObject = new \ReflectionObject($object);
         $attributes = [];
-        $propertyValues = (array) $object;
+        $propertyValues = !method_exists($object, '__get') ? (array) $object : null;
 
         do {
             foreach ($reflectionObject->getProperties() as $property) {
-                if (($property->isPublic() && !\array_key_exists($property->name, $propertyValues))
-                    || ($property->isProtected() && !\array_key_exists("\0*\0{$property->name}", $propertyValues))
-                    || ($property->isPrivate() && !\array_key_exists("\0{$property->class}\0{$property->name}", $propertyValues))
+                if ((null !== $propertyValues && (
+                        ($property->isPublic() && !\array_key_exists($property->name, $propertyValues))
+                        || ($property->isProtected() && !\array_key_exists("\0*\0{$property->name}", $propertyValues))
+                        || ($property->isPrivate() && !\array_key_exists("\0{$property->class}\0{$property->name}", $propertyValues))
+                    ))
                     || !$this->isAllowedAttribute($reflectionObject->getName(), $property->name, $format, $context)
                 ) {
                     continue;
diff --git a/Tests/Normalizer/ObjectNormalizerTest.php b/Tests/Normalizer/ObjectNormalizerTest.php
index c34fa20b6..d60571307 100644
--- a/Tests/Normalizer/ObjectNormalizerTest.php
+++ b/Tests/Normalizer/ObjectNormalizerTest.php
@@ -141,6 +141,16 @@ public function testNormalizeObjectWithUnsetProperties()
         );
     }
 
+    public function testNormalizeObjectWithLazyProperties()
+    {
+        $obj = new LazyObjectInner();
+        unset($obj->foo);
+        $this->assertEquals(
+            ['foo' => 123, 'bar' => null],
+            $this->normalizer->normalize($obj, 'any')
+        );
+    }
+
     /**
      * @requires PHP 7.4
      */
@@ -938,6 +948,16 @@ class ObjectInner
     public $bar;
 }
 
+class LazyObjectInner extends ObjectInner
+{
+    public function __get($name)
+    {
+        if ('foo' === $name) {
+            return $this->foo = 123;
+        }
+    }
+}
+
 class FormatAndContextAwareNormalizer extends ObjectNormalizer
 {
     protected function isAllowedAttribute($classOrObject, string $attribute, string $format = null, array $context = []): bool
diff --git a/Tests/Normalizer/PropertyNormalizerTest.php b/Tests/Normalizer/PropertyNormalizerTest.php
index 98e0cb497..c8cfcd3c2 100644
--- a/Tests/Normalizer/PropertyNormalizerTest.php
+++ b/Tests/Normalizer/PropertyNormalizerTest.php
@@ -108,6 +108,16 @@ public function testNormalizeObjectWithUnsetProperties()
         );
     }
 
+    public function testNormalizeObjectWithLazyProperties()
+    {
+        $obj = new LazyPropertyDummy();
+        unset($obj->foo);
+        $this->assertEquals(
+            ['foo' => 123, 'bar' => null, 'camelCase' => null],
+            $this->normalizer->normalize($obj, 'any')
+        );
+    }
+
     public function testDenormalize()
     {
         $obj = $this->normalizer->denormalize(
@@ -441,6 +451,16 @@ public function setCamelCase($camelCase)
     }
 }
 
+class LazyPropertyDummy extends PropertyDummy
+{
+    public function __get($name)
+    {
+        if ('foo' === $name) {
+            return $this->foo = 123;
+        }
+    }
+}
+
 class PropertyConstructorDummy
 {
     protected $foo;