Assuming that you got your licence two years ago, THAT will still be valid.
Your medical may not be valid depending on your age.
Your Single Engine Piston (Land) Class Rating which would be valid for two years from the date of your PPL skills test will have run out.
Provided that your medical is valid, you just need to pass a flight test with an examiner. After two years this would probably require a little bit of time with an instructor.