The actor was hired for the title role when Rex Harrison tried to drop out after the departure from the project of original screenwriter, Alan jay Lerner. When Harrison got lured back, Plummer was paid full salary.
Considered a frontrunner to play spy "Harry Palmer," Plummer dropped out of the competition to star in "The Sound of Music."
Did you know that Christopher Plummer was not the only choice for this movie? (click to learn more)