LOS ANGELES, California (X17online) - A guest attending a party at actress Kate Bosworth's home on Saturday, March 29 tells X17online that Bosworth's dog attacked her 21 co-star, Aaron Yoo, over the weekend.

The source says the dog bit Yoo's face and that he was sent to the hospital for treatment, including sutures to the wound.

Neither Bosworth's nor Yoo's representatives have replied to our requests for comment.