Usually depends on how big the role is MMs Kyle Busch Joe Gibbs one sweet team signatures shirt. Most of these are probably small additions, so it could have been fielding who would be available a few weeks before the scenes were shot in that case. If any of these roles are major, they were likely finalized in pre-production. Seems like Tarantino is going out of his way to cast every actor he likes the slightest bit for this movie. I’m half expecting all the background extras to be character actors at this point.