So far we've been relying on "sources" close to them for some insight as to what went wrong, but apparently a witness overheard Scarlett screaming bloody murder just days before the split was announced.
"She was screaming into her phone, referring to someone as a 'jerk.' She looked really pissed off," an eyewitness told Us Weekly.
"Scarlett has been unhappy for a while and wanted the separation," a different source added.
Ryan a jerk? Hard to believe, but there have been rumors of an affair between him and his Green Lantern co-star Blake Lively. They both of course denied the rumors, but those things don't just start from nowhere.