Vintage photos show what it was like to party alongside celebs, royals, and politicians on Jackie and Aristotle Onassis' iconic yacht in its glamorous heyday

Aristotle Onassis and Jackie Kennedy Onassis entertaining guests aboard their superyacht, then called "Christina."

Aristotle and Jackie Onassis entertaining guests aboard the Christina.

• Aristotle and Jackie Onassis owned a superyacht named the Christina and frequently entertained an impressive list of guests aboard the ship.
• The infamous couple's social circle included Hollywood stars such as Elizabeth Taylor and Richard Burton, as well as political and royal dignitaries.
• The luxury yacht is now available to rent for $100,000 per day and it outfitted to host extravagant parties.

Jackie O's yacht parties were always invite-only.

Already a national name as former First Lady of the United States - and a legendary fashion icon - Jacqueline Kennedy gained media attention when she started dating wealthy shipping tycoon Aristotle Onassis. She began frequenting his superyacht with her children in the 1960s.

Aristotle Onassis purchased the vessel - originally a convoy escort called the Stormont - at scrap value, turning it into his floating mansion, which he called the Christina. For almost two decades, the yacht served as a meeting place, a reception hall, and the "world's most exclusive bar."

Read more: Take a look at the glitzy yacht once owned by Jackie O that's been the scene of huge celebrity parties, has 17 cabins, and can now be rented for $100,000 a day

Aristotle Onassis and Jackie Kennedy Onassis regularly entertained an elite social group aboard their legendary superyacht following their wedding in 1968. The reception - like so many other events - was held aboard the Christina.

Notable guests over the years included a long list of Hollywood stars, from Elizabeth Taylor to Marilyn Monroe. Frank Sinatra, John Wayne, and Richard Burton also visited, alongside royalty such as the Prince and Princess of Monaco.

Today, the luxury yacht is available to rent for $100,000 per day.

Keep reading for a look at some of the exclusive gatherings the Onassis hosted aboard the Christina, from a lunch with Winston Churchill to Jackie O's own wedding.