The husband of a queen is frequently known as a "prince
consort". Although constitutions of countries vary, when a queen
accedes to the throne, it is rare that her husband will
automatically become a king. The terms "prince consort" and "king
consort" are used instead.
In Great Britain, the title of "prince consort" is not
automatically given. In fact, Prince Phillip, Duke of Edinburgh who
is the husband of Queen Elizabeth II has not been formally given
the title by the queen.