Newcomb became the publicist of Monroe in 1956, during the filming of "Bus Stop." She was later replaced, but rehired in 1960, after Monroe's publicist Rupert Allan moved to Monaco to represent Grace Kelly. Newcomb accompanied Monroe to many events, including to the Madison Square Garden on May 19, 1962, where she performed "Happy Birthday, Mr. President". Newcomb bought Monroe her dog Maf and remained her publicist until Monroe's death on August 4, 1962. The night before, Newcomb had slept at her residence at 12305 Fifth Helena Drive, before waking up around noon and having an argument with Monroe at the pool.