Had she been alive today, Jackie Kennedy would be well into her twilight years, but would doubtlessly still be touted as one of the world's leading style figures.
Commemorating what would have been her 83th birthday (on July 28), LIFE.com has revealed a selection of pictures never published by the magazine.
Featuring Jackie as she accompanied her husband, future President John F Kennedy on the campaign trail and during the election, the black and white shots cement the New York debutante's eventual reputation as one of the most iconic women of all time.
Scroll down for more previously unpublished pictures and a style retrospective
LIFE.com writes: “Looking back now, even in the light of all we know about her fraught, strained, ‘storybook’ marriage to an obsessively philandering husband, there does seem to be something special about Jackie Kennedy.
“Maybe it’s just that the camera loved her. Maybe she was so intriguing to so many people simply because, set beside the other prominent women in Washington, DC, in the early 60s, she was young, chic and, with her Irish and French ancestry, indefinably and refreshingly “exotic”.
Jackie, who married Aristotle Onassis after the assassination of her husband, died at the age of 64, following complications from cancer.
Earlier this month the John F Kennedy Hyannis Museum opened a special summer exhibit on Jackie’s life.
The exhibit includes photos, handwritten letters and other mementoes from her time on Cape Cod.
Previously unpublished pictures of Jackie Kennedy
American President John F. Kennedy (1917 - 1963) and his wife First Lady Jacqueline Kennedy (1929 - 1994), in a dress designed by Oleg Cassini, attend an inaugural event, Washington DC, January 20, 1961. (Photo by Paul Schutzer/Time & Life Pictures/Getty Images)
Close-up of American future First Lady Jacqueline Kennedy (1929 - 1994) as she sits in an armchair a thome in Hyannisport, Massachusetts, 1960. (Photo by Alfred Eisenstaedt/Time & Life Pictures/Getty Images)
Close-up of American future First Lady Jacqueline Kennedy (1929 - 1994), Goergetown, Virginia, September 2, 1960. (Photo by Ed Clark/Time & Life Pictures/Getty Images)
Mrs. John F. Kennedy watching her husband during a debate. (Photo by Paul Schutzer//Time Life Pictures/Getty Images)
American future First Lady Jacqueline Kennedy (1929 - 1994) listens to New York Mayor Robert Wagner (1910 - 1991) at a campaign event, New York, New York, October 1960. (Photo by Ed Clark/Time & Life Pictures/Getty Images)
Portrait of American future First Lady Jacqueline Kennedy (1929 - 1994) as she sits at a table during a campaign dinner, New York, New York, October 1960. (Photo by Ed Clark/Time & Life Pictures/Getty Images)
American Future First Ladys Lady Bird Johnson (1912 - 2007) (center left) and Jacqueline Kennedy (1929 - 1994) (center right, fore) stand together, Hyannisport, Massachusetts, July 1960. (Photo by Paul Schutzer/Time & Life Pictures/Getty Images)
August 12, 1934
In the American countryside -- Jacqueline Kennedy Onassis as a child with her parents John Vernou Bouvier III and Janet Lee Bouvier. (AFP/Getty Images)
September 12, 1953
Jackie in her Anne Lowe wedding dress on her wedding day in Rhode Island. (Getty photo)
December 8, 1960
At Georgetown University Hospital after the baptism for John F. Kennedy Jr. (AP photo)
January 20, 1961
At the presidential inauguration of JFK, wearing a fur-trimmed suit by Oleg Cassini. (Getty photo)
January 20, 1961
At the inauguration of President John F. Kennedy. (Getty photos)
May 31, 1961
Returning from a dinner at the Elysee Palace in Paris, France. (AP photos)
June 2, 1961
French President General Charles de Gaulle and Jacqueline Kennedy during the gala event at the Theater of Versailles' Castle. (AFP/Getty Images)
June 22, 1961
At a White House ceremony in Washington, D.C. (Photo by National Archive/Newsmakers)
November 7, 1961
With India's Prime Minister Jawaharlal Nehru and his daughter, Indira Gandhi, for a private dinner at the White House. (AP photo)
Relaxing in a chair. (AFP/Getty Images)
September 25, 1962
Departing the National Theater. (National Archive/Newsmakers)
An undated photo, presumably an official First Lady portrait. (AP photo)
March 17, 1962
At the Palace of the Maharajah in Udaipur, India during a state visit. (AP photo)
With John F. Kennedy Jr. (AP photo)
April 14, 1963
In Palm Beach, Florida for a private Easter service. (AP photos)
April 4, 1966
Visiting her sister Lee Radziwill in Westminister, London. (Getty photo)
November 22, 1963
Arriving in Texas just before the fateful drive through Dallas. (Getty photo)
December 16, 1967
At the Metropolitan Opera, Lincoln Center, New York City. (Getty photo)
May 14, 1976
With Alexandrje Orfila at the Kennedy Center in Washington, DC. (Getty photos)
July 19, 1986
With former brother-in-law Ted Kennedy at daughter Caroline Kennedy's wedding to Edwin Scholossberg. (Getty photo)
At the Jacqueline Kennedy Onassis estate sale at Sotheby's in New York. (AP photos)