The Diplomatic Revolution of 1756 is the reversal of longstanding alliances in Europe between the War of the Austrian Succession and the Seven Years' War.[

Austria goes from an ally of Britain to an ally of France, while Prussia becomes an ally of Britain.

The most influential diplomat involved is Prince Kaunitz of Austria.

It is part of the stately quadrille, a term popularly used to describe the constantly shifting alliances between the Great Powers of Europe during the eighteenth century.

It is part of efforts to preserve or upset the European balance of power.