The alleged attack, first reported Sunday, reportedly occurred around 3:30 a.m. during the Sundance Film Festival, when an anonymous source tells Page Six he or she saw Hirsch "aggressively picking on Dani." The source continues:
"He got even more aggressive and aggro. He pushed Dani up against a table, and then he put her in a headlock."
Another source claims that Hirsch "attacked her from behind" and put her in a "chokehold."
"He completely blindsided her after he'd been shit-talking and was already led away from her once."
Park City police confirmed to Page Six that they are investigating the incident. As of Tuesday, no charges had been filed.
[image via Getty]