Paris Hilton was hospitalized Friday after a horse she was riding threw her off and kicked her in the stomach during the taping of "The Simple Life 2," a reality show featuring the hotel heiress and a friend on a 30-day cross-country trip.

Hilton, 23, was first treated at the scene in rural Florida north of Tampa, then taken to a hospital, said Chris Alexander, publicist for 20th Century Fox in Los Angeles.

The kick to the stomach left her bruised, but she was not seriously injured, said St. Joseph's Hospital spokeswoman Lisa Patterson. Hilton was released about three hours after she was brought in and was never admitted to the hospital, she said.