personality cult 
noun
Excessive public admiration for or devotion to a famous person, especially a political leader: every pope became the centre of a considerable personality cult...
- But in spite of its collectivist ideology the system rested on a charismatic leader and a personality cult around him.
- But by opposing the myth of the objective reporter, don't you risk falling into the trap of your onscreen persona and the personality cult that grows up around it?
- In addition, he encouraged his own personality cult among his people, acquiring the status of a semi-god over the decades.