Who's there? Let us

Here you can find all the knock knock jokes that have the response 'Let us' to the question who's there?

Knock, knock!
Who's there?
Let us.
Let us who?
Let us in and you will find out.
Do you know more knock knock jokes about "let-us".
Do not hesitate to send it to us so we can publishes it.
Submit your knock knock joke here.