Ronnie Ortiz Magro, Getty Images
Jersey Shore star Ronnie Ortiz-Magro, 27, tweeted to fans on Saturday that he was in the hospital.
"Wouldn't wish this feeling on anyone!" he wrote. "Kidneys."
His rep tells Us Weekly he was suffering from kidney stone pain.
"Worst feeling," he added. "So uncomfortable."
People reports that Ronnie will likely be in the Orlando-area hospital for "several days.