A First Lady is an unofficial title used in the USA and other republics for the wife of the president. Collectively, the president and spouse are known as the First Couple. If they have a family, this is usually referred to as the First Family. The term is sometimes used, particularly in the USA, to refer to the spouse of other heads of state, even if they do not have that style in their own country. Some other countries have a title, formal or informal, that is or can be translated as first lady. The title is not normally used for the wife of a prime minister or other head of government who is not head of state.