diff --git a/dynamic_polymorphism.py b/dynamic_polymorphism.py
index c77ea2a..7162883 100644
--- a/dynamic_polymorphism.py
+++ b/dynamic_polymorphism.py
@@ -12,4 +12,3 @@ def animal_sound(animal):
 print(f" My dog says, {animal_sound(Dog())}")  # Woof!
 print(f" My cat says, {animal_sound(Cat())}")  # Meow!
       
-      
\ No newline at end of file
diff --git a/runtime_polymorphism.py b/runtime_polymorphism.py
new file mode 100644
index 0000000..e82682c
--- /dev/null
+++ b/runtime_polymorphism.py
@@ -0,0 +1,19 @@
+# Demonstrating runtime polymorphism through method overriding
+
+class Animal:
+    def speak(self):
+        return "Some sound"
+
+
+class Bird(Animal):
+    def speak(self):      
+        return "Tweet"
+    
+class Dog(Animal):
+    def speak(self):
+        return "Woof"   
+    
+
+print(Animal().speak())  # Some sound
+print(Bird().speak())    # Tweet
+print(Dog().speak())     # Woof
\ No newline at end of file