The swirling discourse around Quentin TarantinosOnce Upon a Time in Hollywoodhasnt stopped since its release last month.
Well, why not go to Billie Booth herself?
When asked if she believes that Cliff killed Billie, Gayheart already knows.

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Obviously we have an answer to that, but I dont want to spoil it, she tells EW.
And that was intentional.
Hes got a very humble existence with his dog and he kinda stays out of trouble.
Theres definitely doubt put in your head and thats what makes the movie fun.
If you didnt have those questions, you know, would we be talking about it right now?
And she owes taking the role to her daughter because her name is Billie too.
When I read the script I told my daughter that the character is named Billie.
And she was like, Mama, you have to do it!
There were lots of other scenes that were shot that didnt make it in the movie.
I dont know if something will be a part of a directors cut.
I tend to believe that that question will be answered at some point.