Marilyn: The Untold Story is a 1980 television film, about the life of the 1950s sex symbol-movie star, Marilyn Monroe. The feature stars Catherine Hicks as Monroe; Richard Basehart as her early-career agent Johnny Hyde; Frank Converse as her second husband Joe DiMaggio; Jason Miller as her third husband Arthur Miller; Kevin Geer as her first husband James Dougherty; Viveca Lindfors as her acting coach Natasha Lytess; and Sheree North as her mother Gladys Pearl Baker.

The film premiered on September 28, 1980, and was greeted with positive reviews. It was the second-highest-rated prime time program in the United States for the week. Catherine Hicks was praised by the critics for her portrayal of Monroe, as were others including Richard Basehart, Frank Converse, Sheree North, and Jason Miller, playing fellow playwright Arthur Miller.