Marilyn Monroe Sculpture, Chicago, United States

On May 19, 1962, Monroe made her last significant public appearance, singing "Happy Birthday, Mr. President" at a birthday party for President John F. Kennedy at Madison Square Garden. The dress that she wore to the event, specially designed and made for her by Jean Louis, sold at an auction in 1999 for USD $1.26 million.
Monroe reportedly had affairs with both President John F. Kennedy and his brother Senator Robert Kennedy. JFK's reputed mistress Judith Exner, in her 1977 autobiography, also wrote about an affair that she said the president and Monroe had.
Journalist Anthony Summers examines the issue of Monroe's relationships with the Kennedy brothers at length in two books: his 1993 biography of FBI Director J. Edgar Hoover, entitled Official and Confidential: The Secret Life of J. Edgar Hoover, and his 1985 biography of Monroe, entitled Goddess. In the Hoover book, Summers concludes that Monroe was in love with President Kennedy and wanted to marry him in the early 1960s; that she called the White House frequently; and that, when the married President had to break off their affair, Monroe became even more depressed, and then turned to Robert Kennedy, who visited Monroe in Los Angeles the day that she died.
Patricia Seaton Lawford, the fourth wife of actor Peter Lawford, also deals with the Monroe-Kennedy matters in her 1988 biography of Peter Lawford, entitled The Peter Lawford Story. Lawford's first wife was Patricia Kennedy Lawford, a sister of John and Robert; Lawford was very close to the Kennedy family for over a decade, including the time of Monroe's death.