a person employed to promote the interests of an individual, organization, etc., by obtaining favorable publicity through advertisements, mentions in columns, and the like.
Also, pressagent.
Origin
1880-85
Examples from the web for press agent
She has never had a long-term relationship with a recording label, and she has never had a press agent.
British Dictionary definitions for press agent
press agent
noun
1.
a person employed to obtain favourable publicity, such as notices in newspapers, for an organization, actor, etc PA