10:55 AM PT -- Chris' rep tells us, "This is a ridiculous story, a complete fabrication and the result of an odd online illusion that is clearly deceiving and allows for foolish speculation. Just to be clear, Harry Styles did not spit on Chris Pine. There is nothing but respect between these two men and any suggestion otherwise is a blatant attempt to create drama that simply does not exist."
8:31 AM PT -- We've spoken with several sources close to Chris about the alleged spitting ... one tells us it absolutely did happen, and was perceived as a sign of disrespect by Chris. Other sources say Harry absolutely did not spit, and it only appeared that way on the video.
Watch the video ... you see Harry walk up to his seat -- which is sandwiched between costars Chris and Gemma Chan -- and just as he's about to plop down, he appears to somewhat bend forward and purse his lips in a spitting fashion. It's all very fast and smooth.
The dude pauses and looks down at his leg/his seat -- and also stops his clap completely -- only to look up in what appears to be comical disbelief that this just happened (or didn't?) Harry carries on as if nothing's amiss -- so the jury's still out on whether he did it or not.
There are a couple different angles of the "spit shot" ... and in some, it looks more clear than others, which could work in Harry's favor. However, one video of Chris standing up and applauding -- presumably after the credits rolled -- show him seeming a little tense.
We've reached out to Chris and Harry's reps for clarification, but no word back just yet. Neither star has addressed it either on their own at this point ... so for now, it's just speculation on Twitter.