Texan heiress Anna Nicole Smith found the start of shooting on her new movie to be very painful - because she was forced to hobble around the film set on crutches.

The busty former Playboy playmate, 35, made her way to Los Angeles' Chinatown area for her new movie WASABI TUNA - but she turned up injured after fracturing her leg in a nasty rollerblading fall near her Californian mansion.

An eyewitness says, "Anna looked like she was hurting when she arrived. But she went right to work.

"Later, she was asking just about everyone she met: 'Hey, do you have anything I can take for the pain?'"