diff --git a/README.md b/README.md
index 2ca5a92..7fbfc1a 100644
--- a/README.md
+++ b/README.md
@@ -99,6 +99,19 @@ end
   1. `success` (boolean): `true` if the 3D point is visible on screen, `false` otherwise.
   2. `sx`, `sy` (numbers/floats): The 2D screen coordinates if `success` is `true`.
 
+
+### Engine.GetScreenSize()
+
+```lua
+local x, y = Engine.GetScreenSize()
+```
+
+- **Description**: Gets Screen Size
+- **Parameters**:
+  - None
+- **Return Values**:
+  1. `sx`, `sy` (numbers/floats): The Size of the active screen
+
 ---
 
 ## Renderer Table