K-Stew vows never to smile for paparazzi

Kristen Stewart has said that she will never smile for a paparazzi photo and her straight face is here to stay.

The 'Twilight' star told Elle Magazine that now she felt like people will criticize her if she will smile for a paparazzi photo, the Mirror reported.

The 24-year-old actress is the cover girl for the September issue.