diff --git a/library/Mockery.php b/library/Mockery.php
index 05a384b4e..44a5a4b8d 100644
--- a/library/Mockery.php
+++ b/library/Mockery.php
@@ -662,10 +662,22 @@ private static function objectToArray($object, $nesting = 3)
             return array('...');
         }
 
-        return array(
-            'class' => get_class($object),
-            'properties' => self::extractInstancePublicProperties($object, $nesting)
+        $defaultFormatter = function ($object, $nesting) {
+            return array('properties' => self::extractInstancePublicProperties($object, $nesting));
+        };
+
+        $class = get_class($object);
+
+        $formatter = self::getConfiguration()->getObjectFormatter($class, $defaultFormatter);
+
+        $array = array(
+          'class' => $class,
+          'identity' => '#' . md5(spl_object_hash($object))
         );
+
+        $array = array_merge($array, $formatter($object, $nesting));
+
+        return $array;
     }
 
     /**
@@ -685,7 +697,11 @@ private static function extractInstancePublicProperties($object, $nesting)
         foreach ($properties as $publicProperty) {
             if (!$publicProperty->isStatic()) {
                 $name = $publicProperty->getName();
-                $cleanedProperties[$name] = self::cleanupNesting($object->$name, $nesting);
+                try {
+                    $cleanedProperties[$name] = self::cleanupNesting($object->$name, $nesting);
+                } catch (\Exception $exception) {
+                    $cleanedProperties[$name] = $exception->getMessage();
+                }
             }
         }
 
diff --git a/library/Mockery/Configuration.php b/library/Mockery/Configuration.php
index 23e897cdd..e5272874a 100644
--- a/library/Mockery/Configuration.php
+++ b/library/Mockery/Configuration.php
@@ -67,6 +67,13 @@ public function __construct()
         $this->_quickDefinitionsConfiguration = new QuickDefinitionsConfiguration();
     }
 
+    /**
+     * Custom object formatters
+     *
+     * @var array
+     */
+    protected $_objectFormatters = array();
+
     /**
      * Set boolean to allow/prevent mocking of non-existent methods
      *
@@ -211,4 +218,25 @@ public function reflectionCacheEnabled()
     {
         return $this->_reflectionCacheEnabled;
     }
+
+    public function setObjectFormatter($class, $formatterCallback)
+    {
+        $this->_objectFormatters[$class] = $formatterCallback;
+    }
+
+    public function getObjectFormatter($class, $defaultFormatter)
+    {
+        $parentClass = $class;
+        do {
+            $classes[] = $parentClass;
+            $parentClass = get_parent_class($parentClass);
+        } while ($parentClass);
+        $classesAndInterfaces = array_merge($classes, class_implements($class));
+        foreach ($classesAndInterfaces as $type) {
+            if (isset($this->_objectFormatters[$type])) {
+                return $this->_objectFormatters[$type];
+            }
+        }
+        return $defaultFormatter;
+    }
 }
diff --git a/tests/Mockery/WithCustomFormatterExpectationTest.php b/tests/Mockery/WithCustomFormatterExpectationTest.php
new file mode 100644
index 000000000..13c3a37e7
--- /dev/null
+++ b/tests/Mockery/WithCustomFormatterExpectationTest.php
@@ -0,0 +1,196 @@
+<?php
+/**
+ * Mockery
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://github.com/padraic/mockery/master/LICENSE
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to padraic@php.net so we can send you a copy immediately.
+ *
+ * @category     Mockery
+ * @package        Mockery
+ * @subpackage UnitTests
+ * @copyright    Copyright (c) 2010 Pádraic Brady (http://blog.astrumfutura.com)
+ * @license        http://github.com/padraic/mockery/blob/master/LICENSE New BSD License
+ */
+
+use PHPUnit\Framework\TestCase;
+
+class WithCustomFormatterExpectationTest extends TestCase
+{
+    public function setUp(): void
+    {
+        \Mockery::getConfiguration()->setObjectFormatter(
+            'ClassWithCustomFormatter',
+            function ($object, $nesting) {
+                return array(
+                    "formatter" => 'ClassWithCustomFormatter',
+                    "properties" => array(
+                        "stringProperty" => $object->stringProperty
+                    ),
+                    "getters" => array(
+                        "gettedProperty" => $object->getArrayProperty()
+                    )
+                );
+            }
+        );
+        \Mockery::getConfiguration()->setObjectFormatter(
+            'InterfaceWithCustomFormatter',
+            function ($object, $nesting) {
+                return array(
+                    "formatter" => 'InterfaceWithCustomFormatter',
+                    "properties" => array(
+                        "stringProperty" => $object->stringProperty
+                    ),
+                    "getters" => array(
+                        "gettedProperty" => $object->getArrayProperty()
+                    )
+                );
+            }
+        );
+    }
+
+    /**
+     * @dataProvider getObjectFormatterDataProvider
+     */
+    public function testGetObjectFormatter($object, $expected)
+    {
+        $defaultFormatter = function ($class, $nesting) {
+            return null;
+        };
+
+        $formatter = \Mockery::getConfiguration()->getObjectFormatter(get_class($object), $defaultFormatter);
+        $formatted = $formatter($object, 1);
+
+        $this->assertEquals(
+            $expected,
+            $formatted ? $formatted['formatter'] : null
+        );
+    }
+
+    public function getObjectFormatterDataProvider()
+    {
+        return array(
+            array(
+                new \StdClass(),
+                null
+            ),
+            array(
+                new ClassWithoutCustomFormatter(),
+                null
+            ),
+            array(
+                new ClassWithCustomFormatter(),
+                'ClassWithCustomFormatter'
+            ),
+            array(
+                new ClasschildOfWithCustomFormatter(),
+                'ClassWithCustomFormatter'
+            ),
+            array(
+                new ClassImplementsWithCustomFormatter(),
+                'InterfaceWithCustomFormatter'
+            )
+        );
+    }
+
+    /**
+     * @dataProvider formatObjectsDataProvider
+     */
+    public function testFormatObjects($obj, $shouldContains, $shouldNotContains)
+    {
+        $string = Mockery::formatObjects(array($obj));
+        foreach ($shouldContains as $containString) {
+            $this->assertStringContainsString($containString, $string);
+        }
+        foreach ($shouldNotContains as $containString) {
+            $this->assertStringNotContainsString($containString, $string);
+        }
+    }
+
+    public function formatObjectsDataProvider()
+    {
+        return array(
+            array(
+                new ClassWithoutCustomFormatter(),
+                array(
+                    'stringProperty',
+                    'numberProperty',
+                    'arrayProperty'
+                ),
+                array(
+                    'privateProperty'
+                )
+            ),
+            array(
+                new ClassWithCustomFormatter(),
+                array(
+                    'stringProperty',
+                    'gettedProperty'
+                ),
+                array(
+                    'numberProperty',
+                    'privateProperty'
+                )
+            ),
+            array(
+                new ClassImplementsWithCustomFormatter(),
+                array(
+                    'stringProperty',
+                    'gettedProperty'
+                ),
+                array(
+                    'numberProperty',
+                    'privateProperty'
+                )
+            ),
+        );
+    }
+}
+
+class ClassWithoutCustomFormatter
+{
+    public $stringProperty = "a string";
+    public $numberProperty = 123;
+    public $arrayProperty = array('a', 'nother', 'array');
+    private $privateProperty = "private";
+}
+
+class ClassWithCustomFormatter
+{
+    public $stringProperty = "a string";
+    public $numberProperty = 123;
+    private $arrayProperty = array('a', 'nother', 'array');
+    private $privateProperty = "private";
+
+    public function getArrayProperty()
+    {
+        return $this->arrayProperty;
+    }
+}
+
+class ClassChildOfWithCustomFormatter extends ClassWithCustomFormatter
+{
+}
+
+interface InterfaceWithCustomFormatter
+{
+}
+
+class ClassImplementsWithCustomFormatter implements InterfaceWithCustomFormatter
+{
+    public $stringProperty = "a string";
+    public $numberProperty = 123;
+    private $privateProperty = "private";
+    private $arrayProperty = array('a', 'nother', 'array');
+
+    public function getArrayProperty()
+    {
+        return $this->arrayProperty;
+    }
+}