diff --git a/src/Duration.php b/src/Duration.php
index 522ebbf..52607c4 100755
--- a/src/Duration.php
+++ b/src/Duration.php
@@ -157,11 +157,15 @@ public function toMinutes($duration = null, $roundToInteger = false)
      * Returns the duration as a colon formatted string
      *
      * For example, one hour and 42 minutes would be "1:43"
+     * With $zeroFill to true :
+     *   - 42 minutes would be "0:42:00"
+     *   - 28 seconds would be "0:00:28"
      *
      * @param  int|string $duration A string or number, representing a duration
+     * @param  bool $zeroFill A boolean, to force zero-fill result or not (see example)
      * @return string
      */
-    public function formatted($duration = null)
+    public function formatted($duration = null, $zeroFill = false)
     {
 
         if (! is_null($duration)) {
@@ -171,7 +175,7 @@ public function formatted($duration = null)
         $hours = $this->hours + ($this->days * $this->hoursPerDay);
 
         if ($this->seconds > 0)  {
-            if ($this->seconds <= 9 && ($this->minutes > 0 || $hours > 0)) {
+            if ($this->seconds <= 9 && ($this->minutes > 0 || $hours > 0 || $zeroFill)) {
                 $this->output .= '0' . $this->seconds;
             } else {
                 $this->output .= $this->seconds;
@@ -183,19 +187,23 @@ public function formatted($duration = null)
         }
 
         if ($this->minutes > 0) {
-            if ($this->minutes <= 9 && $hours > 0) {
+            if ($this->minutes <= 9 && ($hours > 0 || $zeroFill)) {
                 $this->output = '0' . $this->minutes . ':' . $this->output;
             } else {
                 $this->output = $this->minutes . ':' . $this->output;
             }
         } else {
-            if ($hours > 0) {
+            if ($hours > 0 || $zeroFill) {
                 $this->output = '00' . ':' . $this->output;
             }
         }
 
         if ($hours > 0) {
             $this->output = $hours . ':' . $this->output;
+        } else {
+            if ($zeroFill) {
+                $this->output = '0' . ':' . $this->output;
+            }
         }
 
         return $this->output();
diff --git a/test/DurationTest.php b/test/DurationTest.php
index 8658e66..4873796 100755
--- a/test/DurationTest.php
+++ b/test/DurationTest.php
@@ -119,6 +119,24 @@ public function testConvertingSecondsToFormattedString()
         $this->assertEquals('1:09:09', $this->d->formatted(4149));
     }
 
+    public function testConvertingSecondsToFormattedStringZeroFilled()
+    {
+        $this->assertEquals('0:00:04', $this->d->formatted(4, true));
+        $this->assertEquals('0:00:09', $this->d->formatted(9, true));
+        $this->assertEquals('0:00:42', $this->d->formatted(42, true));
+        $this->assertEquals('0:01:02', $this->d->formatted(62, true));
+        $this->assertEquals('0:01:09', $this->d->formatted(69, true));
+        $this->assertEquals('0:01:42', $this->d->formatted(102, true));
+        $this->assertEquals('0:10:47', $this->d->formatted(647, true));
+        $this->assertEquals('1:00:00', $this->d->formatted(3600, true));
+        $this->assertEquals('1:00:01', $this->d->formatted(3601, true));
+        $this->assertEquals('1:00:11', $this->d->formatted(3611, true));
+        $this->assertEquals('1:01:00', $this->d->formatted(3660, true));
+        $this->assertEquals('1:01:14', $this->d->formatted(3674, true));
+        $this->assertEquals('1:04:25', $this->d->formatted(3865, true));
+        $this->assertEquals('1:09:09', $this->d->formatted(4149, true));
+    }
+
     public function testConvertingFormattedStringsToSeconds()
     {
         $this->assertEquals(4,    $this->d->toSeconds('4'));