Lost Horizon is a 1973 musical fantasy adventure film directed by Charles Jarrott and starring Peter Finch, Liv Ullmann, Sally Kellerman, George Kennedy, Michael York, Olivia Hussey, Bobby Van, James Shigeta, Charles Boyer and John Gielgud. It was also the final film produced by Ross Hunter. The film is a remake of Frank Capra's 1937 film of the same name, with a screenplay by Larry Kramer. Both stories were adapted from James Hilton's 1933 novel Lost Horizon.

Lost Horizon was lambasted by critics at the time of its 1973 release, but since then it has developed a strong cult following. It was selected for inclusion in the book The Fifty Worst Films of All Time, co-written by critic Michael Medved, and is listed in Golden Raspberry Award founder John Wilson's book The Official Razzie Movie Guide as one of The 100 Most Enjoyably Bad Movies Ever Made. The film was a box office disappointment in America, but was financially successful in its overseas market.