Matthew McConaughey had the chance to star in one of the better films in the Marvel Cinematic Universe, but turned it down for something more his style.
The great Gene Wilder agreed to play the title character in Willy Wonka and the Chocolate Factory, but only if director Mel Stuart agreed to one condition.
That creepy doctor who shows up in Severance season 2? You've definitely heard his voice before, because he played a leading role in an animated Disney classic.
Daniel Radcliffe was not particularly fond of his performance in this Harry Potter movie, calling his own acting "one-note" and saying he got "complacent."
It's hard to imagine anyone other than Helena Bonham Carter playing the sadistic Bellatrix Lestrange in the Harry Potter films, but that's almost what happened.