Kristen Stewart was photographed sporting a bright blue cast on her wrist at the Los Angeles airport on Friday, reports.

The 20-year-old actress, sporting sunglasses and a long-sleeved sweatshirt, appeared to be avoiding photographers and was escorted quickly through the airport surrounded by guards. But the sweatshirt didn't fully cover the cast and the paparazzi got a shot of it.

Stewart is expected back on the Vancouver set of the last film in the 'Twilight' saga, 'Breaking Dawn' next week to resume filming. The injury isn't expected to hinder filming.

No cause or explanation has been given for her cast but if Stewart injured it at work, it wouldn't be the first time she was injured while filming. At press conference in 2010, Stewart said she was heavily bruised while shooting 'Welcome to the Rileys' in which she portrayed a stripper.