diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index d41e805918..5f93bb2470 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -12,6 +12,7 @@ Yii Framework 2 Change Log
 - Bug #8483: sequence name in `Schema::getLastInsertId()` was not properly quoted (nineinchnick)
 - Bug #8506: Cleaning of output buffer in `Widget::run()` conflicts with `Pjax` widget which did the cleanup itself (cebe, joester89)
 - Bug #8544: Fixed `yii\db\ActiveRecord` does not updates attribute specified at `optimisticLock()` after save (klimov-paul)
+- Bug #8585: Fixed `yii\helpers\Html::activeTextarea()` does not allow value overriding via options (klimov-paul)
 - Bug: Fixed string comparison in `BaseActiveRecord::unlink()` which may result in wrong comparison result for hash valued primary keys starting with `0e` (cebe)
 - Bug: Pass correct action name to `yii\console\Controller::options()` when default action was requested (cebe)
 - Bug: Automatic garbage collection in `yii\caching\FileCache` was not triggered (kidol)
diff --git a/framework/helpers/BaseHtml.php b/framework/helpers/BaseHtml.php
index 430d055012..b38b656aaa 100644
--- a/framework/helpers/BaseHtml.php
+++ b/framework/helpers/BaseHtml.php
@@ -1331,7 +1331,12 @@ class BaseHtml
     public static function activeTextarea($model, $attribute, $options = [])
     {
         $name = isset($options['name']) ? $options['name'] : static::getInputName($model, $attribute);
-        $value = static::getAttributeValue($model, $attribute);
+        if (isset($options['value'])) {
+            $value = $options['value'];
+            unset($options['value']);
+        } else {
+            $value = static::getAttributeValue($model, $attribute);
+        }
         if (!array_key_exists('id', $options)) {
             $options['id'] = static::getInputId($model, $attribute);
         }
diff --git a/tests/framework/helpers/HtmlTest.php b/tests/framework/helpers/HtmlTest.php
index 91ca85c413..63c286726b 100644
--- a/tests/framework/helpers/HtmlTest.php
+++ b/tests/framework/helpers/HtmlTest.php
@@ -836,6 +836,13 @@ EOD;
                 ],
                 '<textarea id="htmltestmodel-description" name="HtmlTestModel[description]" maxlength="99">some text</textarea>',
             ],
+            [
+                'some text',
+                [
+                    'value' => 'override text'
+                ],
+                '<textarea id="htmltestmodel-description" name="HtmlTestModel[description]">override text</textarea>',
+            ],
         ];
     }