diff --git a/Feed/Feed.php b/Feed/Feed.php
index aa6c81b..8a12efb 100644
--- a/Feed/Feed.php
+++ b/Feed/Feed.php
@@ -15,8 +15,9 @@
 use Eko\FeedBundle\Item\Writer\RoutedItemInterface;
 use Eko\FeedBundle\Formatter\RssFormatter;
 use Eko\FeedBundle\Field\ChannelField;
-use Eko\FeedBundle\Field\ItemField;
+use Eko\FeedBundle\Field\ItemFieldInterface;
 use Eko\FeedBundle\Item\Writer\ItemInterface;
+
 use Symfony\Component\Routing\RouterInterface;
 
 /**
@@ -190,11 +191,11 @@ public function getChannelFields()
     /**
      * Add a new item field to render
      *
-     * @param ItemField $field A custom Field instance
+     * @param ItemFieldInterface $field A custom Field instance
      *
      * @return \Eko\FeedBundle\Feed\Feed
      */
-    public function addItemField(ItemField $field)
+    public function addItemField(ItemFieldInterface $field)
     {
         $this->itemFields[] = $field;
 
diff --git a/Field/GroupItemField.php b/Field/GroupItemField.php
new file mode 100644
index 0000000..f54c88a
--- /dev/null
+++ b/Field/GroupItemField.php
@@ -0,0 +1,66 @@
+<?php
+/*
+ * This file is part of the Eko\FeedBundle Symfony bundle.
+ *
+ * (c) Vincent Composieux <vincent.composieux@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Eko\FeedBundle\Field;
+
+use Eko\FeedBundle\Field\ItemField;
+use Eko\FeedBundle\Field\ItemFieldInterface;
+
+/**
+ * GroupField
+ *
+ * This is items group field class
+ *
+ * @author Vincent Composieux <vincent.composieux@gmail.com>
+ */
+class GroupItemField implements ItemFieldInterface
+{
+    /**
+     * @var string $name Field name
+     */
+    protected $name;
+
+    /**
+     * @var ItemField ItemField instance
+     */
+    protected $itemField;
+
+    /**
+     * Constructor
+     *
+     * @param string    $name      A group field name
+     * @param ItemField $itemField A ItemField instance
+     */
+    public function __construct($name, ItemField $itemField)
+    {
+        $this->name      = $name;
+        $this->itemField = $itemField;
+    }
+
+    /**
+     * Returns group field name
+     *
+     * @return string
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * Returns item field
+     *
+     * @return ItemField
+     */
+    public function getItemField()
+    {
+        return $this->itemField;
+    }
+}
diff --git a/Field/ItemField.php b/Field/ItemField.php
index 09f12d1..869e269 100644
--- a/Field/ItemField.php
+++ b/Field/ItemField.php
@@ -10,14 +10,16 @@
 
 namespace Eko\FeedBundle\Field;
 
+use Eko\FeedBundle\Field\ItemFieldInterface;
+
 /**
- * Field
+ * ItemField
  *
  * This is the items field class
  *
  * @author Vincent Composieux <vincent.composieux@gmail.com>
  */
-class ItemField
+class ItemField implements ItemFieldInterface
 {
     /**
      * @var string $name Field name
diff --git a/Field/ItemFieldInterface.php b/Field/ItemFieldInterface.php
new file mode 100644
index 0000000..394d595
--- /dev/null
+++ b/Field/ItemFieldInterface.php
@@ -0,0 +1,28 @@
+<?php
+/*
+ * This file is part of the Eko\FeedBundle Symfony bundle.
+ *
+ * (c) Vincent Composieux <vincent.composieux@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Eko\FeedBundle\Field;
+
+/**
+ * FieldInterface
+ *
+ * This is the item field interface
+ *
+ * @author Vincent Composieux <vincent.composieux@gmail.com>
+ */
+interface ItemFieldInterface
+{
+    /**
+     * Returns field name
+     *
+     * @return string
+     */
+    public function getName();
+}
diff --git a/Formatter/Formatter.php b/Formatter/Formatter.php
index f23d4b3..4a8b36c 100644
--- a/Formatter/Formatter.php
+++ b/Formatter/Formatter.php
@@ -11,7 +11,8 @@
 namespace Eko\FeedBundle\Formatter;
 
 use Eko\FeedBundle\Feed\Feed;
-use Eko\FeedBundle\Field\ItemField;
+use Eko\FeedBundle\Field\GroupItemField;
+use Eko\FeedBundle\Field\ItemFieldInterface;
 use Eko\FeedBundle\Item\Writer\ItemInterface;
 
 /**
@@ -53,44 +54,66 @@ public function __construct(Feed $feed)
     /**
      * Format items field
      *
-     * @param ItemField     $field A item field instance
-     * @param ItemInterface $item  An entity instance
+     * @param ItemFieldInterface $field A item field instance
+     * @param ItemInterface      $item  An entity instance
      * 
      * @return string
      */
-    protected function format(ItemField $field, ItemInterface $item)
+    protected function format(ItemFieldInterface $field, ItemInterface $item)
     {
         $name = $field->getName();
 
+        if ($field instanceof GroupItemField) {
+            $element = $this->dom->createElement($name);
+            $itemElements = $this->format($field->getItemField(), $item);
+
+            foreach ($itemElements as $itemElement) {
+                $element->appendChild($itemElement);
+            }
+
+            return $element;
+        }
+
+        $elements = array();
+
         $method = $field->getMethod();
-        $value = $item->{$method}();
+        $values = $item->{$method}();
+
+        if (!is_array($values)) {
+            $values = array($values);
+        }
 
-        if ($field->get('cdata')) {
-            $value = $this->dom->createCDATASection($value);
+        foreach ($values as $value) {
+            if ($field->get('cdata')) {
+                $value = $this->dom->createCDATASection($value);
 
-            $element = $this->dom->createElement($name);
-            $element->appendChild($value);
-        } else if ($field->get('attribute')) {
-            if (!$field->get('attribute_name')) {
-                throw new \InvalidArgumentException("'attribute' parameter required an 'attribute_name' parameter.");
-            }
+                $element = $this->dom->createElement($name);
+                $element->appendChild($value);
 
-            $element = $this->dom->createElement($name);
-            $element->setAttribute($field->get('attribute_name'), $item->getFeedItemLink());
+                $elements[] = $element;
+            } else if ($field->get('attribute')) {
+                if (!$field->get('attribute_name')) {
+                    throw new \InvalidArgumentException("'attribute' parameter required an 'attribute_name' parameter.");
+                }
+
+                $element = $this->dom->createElement($name);
+                $element->setAttribute($field->get('attribute_name'), $item->getFeedItemLink());
 
-        } else {
-            if ($format = $field->get('date_format')) {
-                if (!$value instanceof \DateTime) {
-                    throw new \InvalidArgumentException(sprintf('Field "%s" should be a DateTime instance.', $name));
+                $elements[] = $element;
+            } else {
+                if ($format = $field->get('date_format')) {
+                    if (!$value instanceof \DateTime) {
+                        throw new \InvalidArgumentException(sprintf('Field "%s" should be a DateTime instance.', $name));
+                    }
+
+                    $value = $value->format($format);
                 }
 
-                $value = $value->format($format);
+                $elements[] = $this->dom->createElement($name, $value);
             }
-
-            $element = $this->dom->createElement($name, $value);
         }
 
-        return $element;
+        return 1 == count($elements) ? current($elements) : $elements;
     }
 
     /**
diff --git a/README.md b/README.md
index 27e1086..a0e3a72 100644
--- a/README.md
+++ b/README.md
@@ -182,6 +182,17 @@ $feed->add(new FakeEntity());
 $feed->addItemField(new ItemField('fake_custom', 'getFeedItemCustom'));
 ```
 
+You can also add group item fields using this way, if your method returns an array:
+
+```php
+<?php
+$feed = $this->get('eko_feed.feed.manager')->get('article');
+$feed->add(new FakeEntity());
+$feed->addItemField(
+    new GroupItemField('categories', new ItemField('category', 'getFeedCategoriesCustom'))
+);
+```
+
 Of course, `getFeedItemCustom()` method needs to be declared in your entity.
 
 Moreover, entities objects can be added separatly with add method:
diff --git a/Tests/Entity/Writer/FakeItemInterfaceEntity.php b/Tests/Entity/Writer/FakeItemInterfaceEntity.php
index 6687868..a8e7933 100644
--- a/Tests/Entity/Writer/FakeItemInterfaceEntity.php
+++ b/Tests/Entity/Writer/FakeItemInterfaceEntity.php
@@ -70,4 +70,18 @@ public function getFeedItemCustom()
     {
         return 'My custom field';
     }
+
+    /**
+     * Returns a fake custom categories array
+     *
+     * @return array
+     */
+    public function getFeedCategoriesCustom()
+    {
+        return array(
+            'category 1',
+            'category 2',
+            'category 3'
+        );
+    }
 }
\ No newline at end of file
diff --git a/Tests/Format/AtomFormatterTest.php b/Tests/Format/AtomFormatterTest.php
index d099ef1..9a9d0d4 100644
--- a/Tests/Format/AtomFormatterTest.php
+++ b/Tests/Format/AtomFormatterTest.php
@@ -12,6 +12,7 @@
 
 use Eko\FeedBundle\Feed\FeedManager;
 use Eko\FeedBundle\Field\ChannelField;
+use Eko\FeedBundle\Field\GroupItemField;
 use Eko\FeedBundle\Field\ItemField;
 use Eko\FeedBundle\Tests\Entity\Writer\FakeItemInterfaceEntity;
 use Eko\FeedBundle\Tests\Entity\Writer\FakeRoutedItemInterfaceEntity;
@@ -140,6 +141,27 @@ public function testAddCustomItemFieldWithItemInterface()
         $this->assertContains('<fake_custom>My custom field</fake_custom>', $output);
     }
 
+    /**
+     * Check if a custom group item field is properly rendered with ItemInterface
+     */
+    public function testAddCustomGroupItemFieldWithItemInterface()
+    {
+        $feed = $this->manager->get('article');
+        $feed->add(new FakeItemInterfaceEntity());
+        $feed->addItemField(new GroupItemField(
+            'categories',
+            new ItemField('category', 'getFeedCategoriesCustom'))
+        );
+
+        $output = $feed->render('atom');
+
+        $this->assertContains('<categories>', $output);
+        $this->assertContains('<category>category 1</category>', $output);
+        $this->assertContains('<category>category 2</category>', $output);
+        $this->assertContains('<category>category 3</category>', $output);
+        $this->assertContains('</categories>', $output);
+    }
+
     /**
      * Check if a custom item field is properly rendered with RoutedItemInterface
      */
diff --git a/Tests/Format/RSSFormatterTest.php b/Tests/Format/RSSFormatterTest.php
index f3d87bf..45cce7b 100644
--- a/Tests/Format/RSSFormatterTest.php
+++ b/Tests/Format/RSSFormatterTest.php
@@ -12,6 +12,7 @@
 
 use Eko\FeedBundle\Feed\FeedManager;
 use Eko\FeedBundle\Field\ChannelField;
+use Eko\FeedBundle\Field\GroupItemField;
 use Eko\FeedBundle\Field\ItemField;
 use Eko\FeedBundle\Tests\Entity\Writer\FakeItemInterfaceEntity;
 use Eko\FeedBundle\Tests\Entity\Writer\FakeRoutedItemInterfaceEntity;
@@ -115,6 +116,26 @@ public function testAddCustomItemFieldWithItemInterface()
         $this->assertContains('<fake_custom>My custom field</fake_custom>', $output);
     }
 
+    /**
+     * Check if a custom group item field is properly rendered with ItemInterface
+     */
+    public function testAddCustomGroupItemFieldWithItemInterface()
+    {
+        $feed = $this->manager->get('article');
+        $feed->add(new FakeItemInterfaceEntity());
+        $feed->addItemField(
+            new GroupItemField('categories', new ItemField('category', 'getFeedCategoriesCustom'))
+        );
+
+        $output = $feed->render('rss');
+
+        $this->assertContains('<categories>', $output);
+        $this->assertContains('<category>category 1</category>', $output);
+        $this->assertContains('<category>category 2</category>', $output);
+        $this->assertContains('<category>category 3</category>', $output);
+        $this->assertContains('</categories>', $output);
+    }
+
     /**
      * Check if a custom item field is properly rendered with RoutedItemInterface
      */