Long before superhero movies dominated the box office and just about every comic book franchise was getting some kind of adaptation, the idea of adapting a comic book to the big screen was a pretty massive undertaking. So it was that in 1978, Richard Donner's Superman changed everything.
Starring newcomer Christopher Reeve as the Man of Steel himself, Marlon Brando as his father, Jor-El, Gene Hackman as his arch-nemesis, Lex Luthor, and Margot Kidder as the love of his life, Lois Lane, the movie was a massive box-office hit and spawned an entire movie franchise. It still holds up today, but we have a feeling that even fans might not know these facts about it.
The bodybuilding routine Christopher Reeve underwent was supervised by David Prowse
You might know him best as the man in the Darth Vader suit
He worked out so much during filming they had to reshoot his earlier scenes
He'd gained so much muscle that the older footage didn't match the newer footage anymore.
Reeve had lots of female admirers on set... when he was in his Superman costume
When dressed as Clark Kent, apparently nobody noticed him.
Richard Donner tricked Gene Hackman into shaving his mustache
He told Hackman he'd shave his own if Hackman did. As it turns out, Donner, didn't have a mustache; it was a fake that he removed at the last second.
Marlon Brando refused to learn his lines ahead of filming
He read his lines off the baby Kal-El's diaper. According to Donner, Brando said the only way to ensure his lines weren't over-rehearsed was to record his first reading.
He also sued Warner Bros. for $50 Million
He felt his contract didn't award him an amount appropriate to how successful the movie was. This is why footage of him never appears in Superman II.