Director William Wyler made 3 brave choices in Roman Holiday (1953).

1. He worked happily with the blacklisted writer Dalton Trumbo (undercover), when other directors shied away.

2. He went on location to shoot the film in black and white, even though color was readily available

3. He cast an unknown European actress for the leading part, based on a single test.

They all worked out rather handily.