diff --git a/components/CMakeLists.txt b/components/CMakeLists.txt
index efc80081e3..96e64459db 100644
--- a/components/CMakeLists.txt
+++ b/components/CMakeLists.txt
@@ -256,7 +256,7 @@ add_component_dir (fallback
 add_component_dir (lua_ui
     registerscriptsettings scriptsettings
     properties widget element util layers content alignment resources
-    adapter text textedit window image container
+    adapter text textedit window image container flex
     )
 
 
diff --git a/components/lua_ui/alignment.cpp b/components/lua_ui/alignment.cpp
index dfd09b752d..358c5ba14b 100644
--- a/components/lua_ui/alignment.cpp
+++ b/components/lua_ui/alignment.cpp
@@ -9,9 +9,9 @@ namespace LuaUi
             align |= MyGUI::Align::Left;
         if (horizontal == Alignment::End)
             align |= MyGUI::Align::Right;
-        if (horizontal == Alignment::Start)
+        if (vertical == Alignment::Start)
             align |= MyGUI::Align::Top;
-        if (horizontal == Alignment::End)
+        if (vertical == Alignment::End)
             align |= MyGUI::Align::Bottom;
         return align;
     }
diff --git a/components/lua_ui/container.cpp b/components/lua_ui/container.cpp
index 867378744b..11b9c1b360 100644
--- a/components/lua_ui/container.cpp
+++ b/components/lua_ui/container.cpp
@@ -29,7 +29,7 @@ namespace LuaUi
             size.width = std::max(size.width, coord.left + coord.width);
             size.height = std::max(size.height, coord.top + coord.height);
         }
-        setForcedSize(size);
+        forceSize(size);
         updateCoord();
     }
 }
diff --git a/components/lua_ui/element.cpp b/components/lua_ui/element.cpp
index 47dd0a3d38..a939ccdc51 100644
--- a/components/lua_ui/element.cpp
+++ b/components/lua_ui/element.cpp
@@ -136,8 +136,8 @@ namespace LuaUi
         setTemplate(ext, layout.get<sol::object>(LayoutKeys::templateLayout));
         ext->setProperties(layout.get<sol::object>(LayoutKeys::props));
         setEventCallbacks(ext, layout.get<sol::object>(LayoutKeys::events));
-
         ext->setChildren(updateContent(ext->children(), layout.get<sol::object>(LayoutKeys::content)));
+        ext->updateCoord();
     }
 
     std::string setLayer(WidgetExtension* ext, const sol::table& layout)
diff --git a/components/lua_ui/flex.cpp b/components/lua_ui/flex.cpp
new file mode 100644
index 0000000000..13acfb3990
--- /dev/null
+++ b/components/lua_ui/flex.cpp
@@ -0,0 +1,88 @@
+#include "flex.hpp"
+
+namespace LuaUi
+{
+    void LuaFlex::updateProperties()
+    {
+        mHorizontal = propertyValue("horizontal", false);
+        mAutoSized = propertyValue("autoSize", true);
+        mAlign = propertyValue("align", Alignment::Start);
+        mArrange = propertyValue("arrange", Alignment::Start);
+        WidgetExtension::updateProperties();
+    }
+
+    namespace
+    {
+        int alignSize(int container, int content, Alignment alignment)
+        {
+            int alignedPosition = 0;
+            {
+                switch (alignment)
+                {
+                case Alignment::Start:
+                    alignedPosition = 0;
+                    break;
+                case Alignment::Center:
+                    alignedPosition = (container - content) / 2;
+                    break;
+                case Alignment::End:
+                    alignedPosition = container - content;
+                    break;
+                }
+            }
+            return alignedPosition;
+        }
+
+        float getGrow(WidgetExtension* w)
+        {
+            return std::max(0.0f, w->externalValue("grow", 0.0f));
+        }
+    }
+
+    void LuaFlex::updateChildren()
+    {
+        float totalGrow = 0;
+        MyGUI::IntSize childrenSize;
+        for (auto* w: children())
+        {
+            w->clearForced();
+            MyGUI::IntSize size = w->calculateSize();
+            primary(childrenSize) += primary(size);
+            secondary(childrenSize) = std::max(secondary(childrenSize), secondary(size));
+            totalGrow += getGrow(w);
+        }
+        mChildrenSize = childrenSize;
+
+        MyGUI::IntSize flexSize = calculateSize();
+        int growSize = 0;
+        float growFactor = 0;
+        if (totalGrow > 0)
+        {
+            growSize = primary(flexSize) - primary(childrenSize);
+            growFactor = growSize / totalGrow;
+        }   
+
+        MyGUI::IntPoint childPosition;
+        primary(childPosition) = alignSize(primary(flexSize) - growSize, primary(childrenSize), mAlign);
+        secondary(childPosition) = alignSize(secondary(flexSize), secondary(childrenSize), mArrange);
+        for (auto* w : children())
+        {
+            w->forcePosition(childPosition);
+            MyGUI::IntSize size = w->widget()->getSize();
+            primary(size) += static_cast<int>(growFactor * getGrow(w));
+            w->forceSize(size);
+            primary(childPosition) += primary(size);
+        }
+        WidgetExtension::updateProperties();
+    }
+
+    MyGUI::IntSize LuaFlex::calculateSize()
+    {
+        MyGUI::IntSize size = WidgetExtension::calculateSize();
+        if (mAutoSized) {
+            primary(size) = primary(mChildrenSize);
+            secondary(size) = std::max(secondary(size), secondary(mChildrenSize));
+        }
+        return size;
+    }
+}
diff --git a/components/lua_ui/flex.hpp b/components/lua_ui/flex.hpp
new file mode 100644
index 0000000000..9ac85213f6
--- /dev/null
+++ b/components/lua_ui/flex.hpp
@@ -0,0 +1,55 @@
+#ifndef OPENMW_LUAUI_FLEX
+#define OPENMW_LUAUI_FLEX
+
+#include "widget.hpp"
+#include "alignment.hpp"
+
+namespace LuaUi
+{
+    class LuaFlex : public MyGUI::Widget, public WidgetExtension
+    {
+        MYGUI_RTTI_DERIVED(LuaFlex)
+
+        protected:
+            MyGUI::IntSize calculateSize() override;
+            void updateProperties() override;
+            void updateChildren() override;
+            MyGUI::IntSize childScalingSize() override
+            {
+                return MyGUI::IntSize();
+            }
+
+        private:
+            bool mHorizontal;
+            bool mAutoSized;
+            MyGUI::IntSize mChildrenSize;
+            Alignment mAlign;
+            Alignment mArrange;
+
+            template<typename T>
+            T& primary(MyGUI::types::TPoint<T>& point)
+            {
+                return mHorizontal ? point.left : point.top;
+            }
+
+            template<typename T>
+            T& secondary(MyGUI::types::TPoint<T>& point)
+            {
+                return mHorizontal ? point.top : point.left;
+            }
+
+            template<typename T>
+            T& primary(MyGUI::types::TSize<T>& size)
+            {
+                return mHorizontal ? size.width : size.height;
+            }
+
+            template<typename T>
+            T& secondary(MyGUI::types::TSize<T>& size)
+            {
+                return mHorizontal ? size.height : size.width;
+            }
+    };
+}
+
+#endif // OPENMW_LUAUI_FLEX
diff --git a/components/lua_ui/util.cpp b/components/lua_ui/util.cpp
index cd2cb2c077..d7e7390647 100644
--- a/components/lua_ui/util.cpp
+++ b/components/lua_ui/util.cpp
@@ -9,6 +9,7 @@
 #include "window.hpp"
 #include "image.hpp"
 #include "container.hpp"
+#include "flex.hpp"
 
 #include "element.hpp"
 #include "registerscriptsettings.hpp"
@@ -24,8 +25,9 @@ namespace LuaUi
         MyGUI::FactoryManager::getInstance().registerFactory<LuaTextEdit>("Widget");
         MyGUI::FactoryManager::getInstance().registerFactory<LuaWindow>("Widget");
         MyGUI::FactoryManager::getInstance().registerFactory<LuaImage>("Widget");
-        MyGUI::FactoryManager::getInstance().registerFactory<LuaContainer>("Widget");
         MyGUI::FactoryManager::getInstance().registerFactory<LuaTileRect>("BasisSkin");
+        MyGUI::FactoryManager::getInstance().registerFactory<LuaContainer>("Widget");
+        MyGUI::FactoryManager::getInstance().registerFactory<LuaFlex>("Widget");
     }
 
     const std::unordered_map<std::string, std::string>& widgetTypeToName()
@@ -36,6 +38,7 @@ namespace LuaUi
             { "LuaTextEdit", "TextEdit" },
             { "LuaWindow", "Window" },
             { "LuaImage", "Image" },
+            { "LuaFlex", "Flex" },
         };
         return types;
     }
diff --git a/components/lua_ui/widget.cpp b/components/lua_ui/widget.cpp
index 74ac8640e0..87b1636d74 100644
--- a/components/lua_ui/widget.cpp
+++ b/components/lua_ui/widget.cpp
@@ -10,7 +10,9 @@
 namespace LuaUi
 {
     WidgetExtension::WidgetExtension()
-        : mPropagateEvents(true)
+        : mForcePosition(false)
+        , mForceSize(false)
+        , mPropagateEvents(true)
         , mLua(nullptr)
         , mWidget(nullptr)
         , mSlot(this)
@@ -85,7 +87,6 @@ namespace LuaUi
         ext->mParent = this;
         ext->mTemplateChild = false;
         ext->widget()->attachToWidget(mSlot->widget());
-        ext->updateCoord();
     }
 
     void WidgetExtension::attachTemplate(WidgetExtension* ext)
@@ -93,7 +94,6 @@ namespace LuaUi
         ext->mParent = this;
         ext->mTemplateChild = true;
         ext->widget()->attachToWidget(widget());
-        ext->updateCoord();
     }
 
     WidgetExtension* WidgetExtension::findDeep(std::string_view flagName)
@@ -219,16 +219,30 @@ namespace LuaUi
         return mForcedCoord;
     }
 
-    void WidgetExtension::setForcedCoord(const MyGUI::IntCoord& offset)
+    void WidgetExtension::forceCoord(const MyGUI::IntCoord& offset)
     {
+        mForcePosition = true;
+        mForceSize = true;
         mForcedCoord = offset;
     }
 
-    void WidgetExtension::setForcedSize(const MyGUI::IntSize& size)
+    void WidgetExtension::forcePosition(const MyGUI::IntPoint& pos)
     {
+        mForcePosition = true;
+        mForcedCoord = pos;
+    }
+
+    void WidgetExtension::forceSize(const MyGUI::IntSize& size)
+    {
+        mForceSize = true;
         mForcedCoord = size;
     }
 
+    void WidgetExtension::clearForced() {
+        mForcePosition = false;
+        mForceSize = false;
+    }
+
     void WidgetExtension::updateCoord()
     {
         MyGUI::IntCoord oldCoord = mWidget->getCoord();
@@ -246,7 +260,6 @@ namespace LuaUi
     {
         mProperties = props;
         updateProperties();
-        updateCoord();
     }
 
     void WidgetExtension::updateProperties()
@@ -281,9 +294,12 @@ namespace LuaUi
 
     MyGUI::IntSize WidgetExtension::calculateSize()
     {
+        if (mForceSize)
+            return mForcedCoord.size();
+
         MyGUI::IntSize pSize = parentSize();
         MyGUI::IntSize newSize;
-        newSize = mAbsoluteCoord.size() + mForcedCoord.size();
+        newSize = mAbsoluteCoord.size();
         newSize.width += mRelativeCoord.width * pSize.width;
         newSize.height += mRelativeCoord.height * pSize.height;
         return newSize;
@@ -291,9 +307,11 @@ namespace LuaUi
 
     MyGUI::IntPoint WidgetExtension::calculatePosition(const MyGUI::IntSize& size)
     {
+        if (mForcePosition)
+            return mForcedCoord.point();
         MyGUI::IntSize pSize = parentSize();
         MyGUI::IntPoint newPosition;
-        newPosition = mAbsoluteCoord.point() + mForcedCoord.point();
+        newPosition = mAbsoluteCoord.point();
         newPosition.left += mRelativeCoord.left * pSize.width - mAnchor.width * size.width;
         newPosition.top += mRelativeCoord.top * pSize.height - mAnchor.height * size.height;
         return newPosition;
diff --git a/components/lua_ui/widget.hpp b/components/lua_ui/widget.hpp
index c712d18ccd..33bf52cd78 100644
--- a/components/lua_ui/widget.hpp
+++ b/components/lua_ui/widget.hpp
@@ -47,8 +47,11 @@ namespace LuaUi
         void setExternal(sol::object external) { mExternal = external; }
 
         MyGUI::IntCoord forcedCoord();
-        void setForcedCoord(const MyGUI::IntCoord& offset);
-        void setForcedSize(const MyGUI::IntSize& size);
+        void forceCoord(const MyGUI::IntCoord& offset);
+        void forceSize(const MyGUI::IntSize& size);
+        void forcePosition(const MyGUI::IntPoint& pos);
+        void clearForced();
+
         void updateCoord();
 
         const sol::table& getLayout() { return mLayout; }
@@ -65,6 +68,9 @@ namespace LuaUi
             mOnCoordChange = callback;
         }
 
+        virtual MyGUI::IntSize calculateSize();
+        virtual MyGUI::IntPoint calculatePosition(const MyGUI::IntSize& size);
+
     protected:
         virtual void initialize();
         sol::table makeTable() const;
@@ -72,8 +78,6 @@ namespace LuaUi
         sol::object mouseEvent(int left, int top, MyGUI::MouseButton button) const;
 
         MyGUI::IntSize parentSize();
-        virtual MyGUI::IntSize calculateSize();
-        virtual MyGUI::IntPoint calculatePosition(const MyGUI::IntSize& size);
         MyGUI::IntCoord calculateCoord();
         virtual MyGUI::IntSize childScalingSize();
 
@@ -113,6 +117,8 @@ namespace LuaUi
             }
         }
 
+        bool mForcePosition;
+        bool mForceSize;
         // offsets the position and size, used only in C++ widget code
         MyGUI::IntCoord mForcedCoord;
         // position and size in pixels
diff --git a/components/lua_ui/window.cpp b/components/lua_ui/window.cpp
index 41281208d4..a9fff5ff47 100644
--- a/components/lua_ui/window.cpp
+++ b/components/lua_ui/window.cpp
@@ -39,8 +39,7 @@ namespace LuaUi
         if (mCaption)
             mCaption->setCaption(propertyValue("caption", std::string()));
         mMoveResize = MyGUI::IntCoord();
-        setForcedCoord(mMoveResize);
-
+        clearForced();
         WidgetExtension::updateProperties();
     }
 
@@ -70,11 +69,8 @@ namespace LuaUi
         change.width *= (left - mPreviousMouse.left);
         change.height *= (top - mPreviousMouse.top);
 
-        mMoveResize = mMoveResize + change.size();
-        setForcedCoord(mMoveResize);
-        // position can change based on size changes
-        mMoveResize = mMoveResize + change.point() + getPosition() - calculateCoord().point();
-        setForcedCoord(mMoveResize);
+        mMoveResize = mMoveResize + change;
+        forceCoord(mMoveResize);
         updateCoord();
 
         mPreviousMouse.left = left;
diff --git a/docs/source/reference/lua-scripting/user_interface.rst b/docs/source/reference/lua-scripting/user_interface.rst
index 71ad61b410..394c53e688 100644
--- a/docs/source/reference/lua-scripting/user_interface.rst
+++ b/docs/source/reference/lua-scripting/user_interface.rst
@@ -81,6 +81,7 @@ Widget types
    Text: Displays text. <widgets/text>
    TextEdit: Accepts text input from the user. <widgets/textedit>
    Image: Renders a texture. <widgets/image>
+   Flex: Aligns children in a column/row <widgets/flex>
 
 Example
 -------
diff --git a/docs/source/reference/lua-scripting/widgets/flex.rst b/docs/source/reference/lua-scripting/widgets/flex.rst
new file mode 100644
index 0000000000..359d0d4394
--- /dev/null
+++ b/docs/source/reference/lua-scripting/widgets/flex.rst
@@ -0,0 +1,43 @@
+Flex Widget
+===========
+
+Aligns its children along either a column or a row, depending on the `horizontal` property.
+
+Properties
+----------
+
+.. list-table::
+  :header-rows: 1
+  :widths: 20 20 60
+
+  * - name
+    - type (default value)
+    - description
+  * - horizontal
+    - bool (false)
+    - Flex aligns its children in a row if true, otherwise in a column.
+  * - autoSize
+    - bool (true)
+    - | If true, Flex will automatically resize to fit its contents.
+      | Children can't be relatively position/sized when true.
+  * - align
+    - ui.ALIGNMENT (Start)
+    - Where to align the children in the main axis.
+  * - arrange
+    - ui.ALIGNMETN (Start)
+    - How to arrange the children in the cross axis.
+
+External
+--------
+.. list-table::
+  :header-rows: 1
+  :widths: 20 20 60
+
+  * - name
+    - type (default value)
+    - description
+  * - grow
+    - float (0)
+    - | Grow factor for the child. If there is unused space in the Flex,
+      | it will be split between widgets according to this value.
+      | Has no effect if `autoSize` is `true`.