Once Upon a Time in Hollywood gets an Avengers-style anti-spoiler campaign.
1 / 8
For both Infinity War and Endgame, directors Joe & Anthony Russo asked fans to not spoil the movie.
2 / 8
They posted letters on social media using creative hashtags that went viral.
3 / 8
Quentin Tarantino did the same thing for Once Upon a Time in Hollywood.
4 / 8
The film premieres at Cannes, two months before its theatrical debut.
5 / 8
Tarantino implored attendees to preserve the film's secrets.
6 / 8
That way, everyone can see the movie the way it was meant to be seen.
7 / 8