NEW YORK, NY - OCTOBER 01: Lois Smith attends the 2012 Horton Foote Prizes Private award reception at The Lotos Club on October 1, 2012 in New York City. (Photo by Simon Russell/Getty Images)
Her death on Sunday was confirmed by Cindi Berger, chairman and CEO of PMK*BNC. Smith was one of the founders of the publicity firm that eventually merged with other firms to become PMK*BNC.
Smith died from a brain hemorrhage after falling during a trip to Maine with her husband.
Berger described Smith as a "trailblazer" in the publicity field "who loved her clients and guided them with strong and steady hands."
Her list of clients during her decades in the business also included Meryl Streep, Warren Beatty, and Whitney Houston.
She is survived by her husband and three of her children. A son died in 1985.
(Copyright 2012 by The Associated Press. All Rights Reserved.)