diff --git a/CHANGELOG-v3.md b/CHANGELOG-v3.md
index 72c57485017..df6a8e0a83d 100644
--- a/CHANGELOG-v3.md
+++ b/CHANGELOG-v3.md
@@ -23,6 +23,7 @@
 - `Craft.EntryTypeSwitcher` now triggers a `typeChange` event after switching the entry type. ([#3067](https://github.com/craftcms/cms/pull/3067))
 - Reduced the left and right padding in the Control Panel for screens less than 768 pixels wide. ([#3073](https://github.com/craftcms/cms/issues/3073))
 - Removed the `useXSendFile` config setting as it’s no longer being used.
+- `craft\helpers\StringHelper::toKebabCase()`, `toCamelCase()`, `toPascalCase()`, and `toSnakeCase()` now treat camelCase’d and PascalCale’d strings as multiple words. ([#3090](https://github.com/craftcms/cms/issues/3090))
 
 ### Fixed
 - Fixed a bug where `craft\i18n\I18N::getPrimarySiteLocale()` and `getPrimarySiteLocaleId()` were returning locale info for the _first_ site, rather than the primary one. ([#3063](https://github.com/craftcms/cms/issues/3063))
diff --git a/src/helpers/StringHelper.php b/src/helpers/StringHelper.php
index d19b319f803..943696c9ef3 100644
--- a/src/helpers/StringHelper.php
+++ b/src/helpers/StringHelper.php
@@ -11,6 +11,7 @@
 use Stringy\Stringy as BaseStringy;
 use yii\base\Exception;
 use yii\base\InvalidConfigException;
+use yii\helpers\Inflector;
 
 /**
  * This helper class provides various multi-byte aware string related manipulation and encoding methods.
@@ -1040,7 +1041,7 @@ private static function _prepStringForCasing(string $string, bool $lower = true,
     {
         if ($lower) {
             // Make it lowercase
-            $string = static::toLowerCase($string);
+            $string = Inflector::camel2words($string, false);
         }
 
         if ($removePunctuation) {