One who publicizes, especially a press or publicity agent.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "publicist" in a sentence
"Your publicist is there to advise you on strategic planning, image, and groom you for interviews with the media."
"Personally, I think her publicist is the person spreading these rumors."
"For some reason (the economy?) this year, my publicist is not only responding to my various e-mails, but she's also out hunting up work for me."