diff --git a/src/Collections/IImmutableCollection.php b/src/Collections/IImmutableCollection.php
index 7022274..7867f67 100644
--- a/src/Collections/IImmutableCollection.php
+++ b/src/Collections/IImmutableCollection.php
@@ -161,6 +161,25 @@ interface IImmutableCollection extends IteratorAggregate, JsonSerializable, Coun
      */
     public static function split (string $value, string $separator): static;
 
+    /**
+     * Create a collection filled with the same element
+     *
+     * @param int    $size  The collection size
+     * @param TValue $value The value to fill the collection
+     *
+     * @return static<int, TValue> The result collection
+     */
+    public static function fill (int $size, $value): static;
+    /**
+     * Create a collection filled with the same element, using a list of keys
+     *
+     * @param IImmutableCollection<TKey> $keys  The list of keys
+     * @param TValue                     $value The value to fill the collection
+     *
+     * @return static<TKey, TValue> The result collection
+     */
+    public static function fillWithKeys (IImmutableCollection $keys, $value): static;
+
     /**
      * Merge the current collection with one or multiple collections
      *
diff --git a/src/Collections/ImmutableCollection.php b/src/Collections/ImmutableCollection.php
index 4dc51b9..fc8bc1c 100644
--- a/src/Collections/ImmutableCollection.php
+++ b/src/Collections/ImmutableCollection.php
@@ -365,6 +365,28 @@ class ImmutableCollection implements IImmutableCollection {
         return new static (explode($separator, $value));
     }
 
+    /**
+     * @inheritDoc
+     */
+    public static function fill (int $size, $value): static {
+        $keys = new ImmutableCollection();
+        for ($curr = 0; $curr < $size; $curr++) {
+            $keys->_add($curr);
+        }
+
+        return static::fillWithKeys($keys, $value);
+    }
+    /**
+     * @inheritDoc
+     */
+    public static function fillWithKeys (IImmutableCollection $keys, $value): static {
+        $collection = new static();
+        foreach ($keys as $key) {
+            $collection->_set($key, $value);
+        }
+        return $collection;
+    }
+
     /**
      * @inheritDoc
      */
diff --git a/tests/test.php b/tests/test.php
index 6d404ab..a48e0d4 100644
--- a/tests/test.php
+++ b/tests/test.php
@@ -1,5 +1,6 @@
 <?php
 
+use jrosset\Collections\ImmutableCollection;
 use jrosset\Collections\InsensitiveCaseKeyCollection;
 use jrosset\Collections\InsensitiveCaseKeyImmutableCollection;
 
@@ -18,4 +19,9 @@ echo '-----' . PHP_EOL;
 
 $collection = new InsensitiveCaseKeyCollection($readOnlyCollection);
 $collection->add(28);
-echo 'Size : ' . $collection->count() . PHP_EOL;
\ No newline at end of file
+echo 'Size : ' . $collection->count() . PHP_EOL;
+
+echo 'Fill :' . PHP_EOL;
+foreach (ImmutableCollection::fill(5, -1) as $key => $value) {
+    echo "\t#" . $key . ' = ' . $value . PHP_EOL;
+}
\ No newline at end of file