a list of important or prominent persons, as of those regarded as highly desirable guests at upper-class social or cultural events
See A-list in American Heritage Dictionary 4
or A-list(āˈlĭstˌ)
noun Informal
A list or group of the most admired or desirable people, as for a job or social gathering: famous actors on the casting director's A list; a private party for Hollywood's A-list.