The Twilight actress was waiting for a car to pick her up when she unleashed some choice words on the paparazzi nearby.
In a short video taken in Los Angeles and uploaded by TMZ, Kristen can be seen standing behind a mesh gate with an assistant by her side. At one stage she shouts to the unseen paparazzo: "You don't deserve to breathe the same air I do" at one outspoken photographer nearby.
It's not clear what happened before her outburst.
The photographer - who also appears to be the one filming the video - then asks the Hollywood star: "Why are you saying that?" and adds: "Are you and Robert Pattinson back together?". However, she does not respond.
Kristen is currently shooting her latest gritty film, Camp X-Ray, in which she plays a young American soldier that is stationed at Guantanamo Bay detention camp in Cuba.
She has been keeping busy with appearances at Paris Fashion Week and spending time with her friends in the States following her break-up with on-off boyfriend Rob.
Meanwhile, R-Pattz has been moving on from the split too by having fun hanging out with Beyoncé and hanging out with friends including Jesse Eisenberg.
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