Here are the actors and actresses who appeared in the 1945 film "It Happened One Night":
* Clark Gable as Peter Warne
* Claudette Colbert as Ellie Andrews
* Walter Connolly as Alexander Andrews
* Rosalind Russell as "The Other Woman" (uncredited)
* Alan Hale as Osgood Fielding III
* Charles Grapewin as Pop
* H.B. Warner as Mr. Andrews
* Doris Lloyd as Mrs. Andrews
* James Gleason as a Bus Driver
* Patric Knowles as a Reporter (uncredited)
There was no film called "It Happened One Weekend" released in 1974.