The actress took a swing at a photographer with her designer handbag as she walked through Los Angeles airport yesterday.
The 26-year-old felt one of the snappers had got a little too close for comfort and yelled expletives as she lunged at him.
Snap: Sienna Miller lost her temper at LAX airport yesterday
Designer weapon: the actress took a swipe at a pesky photographer with her pink tote as she made her way thorugh the terminal
Luckily for the snapper the bag didn't contain anything heavy and he simply laughed at the furious Factory Girl as airport security stepped in to help.
A day earlier the actress caught up with Matthew Rhys, her costar in the upcoming Dylan Thomas biopic The Edge Of Love.