Patrick Schwarzenegger

Patrick Schwarzenegger, the 18-year-old son of Arnold Schwarzenegger and Maria Shriver, was taken to the hospital on a stretcher Saturday after a ski accident in Sun Valley, Idaho.

Patrick, an actor, model and entrepreneur, tweeted about his injuries late Saturday. "Little ski accident today," he wrote. "Some bruises and stiches down back and butt. Thanks to Sun Valley doctors for everything."

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His injury comes a month after his father was in the hospital to get a "tune-up" on his shoulder, and seven months after younger brother Christopher, 14, suffered a collapsed lung and broke several bones after a boogie boarding accident.

Patrick caused controversy shortly after his famous parents announced they were divorcing last year when he changed his name on his Twitter account from "Patrick Schwarzenegger" to "Patrick Shriver."