A camarilla is a group of courtiers or favourites who surround a king or ruler. Usually, they do not hold any office or have any official authority at the royal court but influence their ruler behind the scenes. Consequently, they also escape having to bear responsibility for the effects of their advice. The term derives from the Spanish word camarilla (diminutive of cámara), meaning "little chamber" or private cabinet of the king. It was first used of the circle of cronies around Spanish King Ferdinand VII (reigned 1814-1833). The term involves what is known as cronyism. The term also entered other languages like the Polish, German and Greek, and is used in the sense given above.

A similar concept in modern politics is that of a Kitchen Cabinet, which is often composed of unelected advisers bypassing traditional governance practices.