Dwayne "The Rock" Johnson is furious at one of his co-stars, as he explained in a lengthy Instagram rant yesterday in which he called the mystery actor a "chicken sh*t" and "candy ass."

Many immediately speculated that Johnson was talking about Tyrese, but the singer and actor posted his own lengthy Instagram letter refuting the claim (along with a video of Rock singing "Happy Birthday" to his daughter as proof that there's no bad blood).  

Now, though, we know he was actually talking about Vin Diesel.

Here's the post that started it all:

And then Tyrese responded to make sure nobody would give him the side-eye in this drama:

Welp, according to TMZ, the real beef is between Rock and Diesel. According to reports, Rock is unhappy with some of the decisions Diesel made about Furious 8 as a producer, and things got so heated between them on set, it was becoming impossible for them to shoot scenes together.
Finally, the site reports, production got the two to sit down in a closed-door meeting to work it out. No clue as to whether it was actually effective, but, for now, it seems like the show will go on.

Meanwhile, Rock's co-stars are all furious with him for airing their dirty laundry on social media just a week and a half before filming wraps.
Get the full story behind this behind-the-scenes drama with BET Breaks, above.