Mary-Kate Olsen has been hospitalized with a kidney infection.
The former "Full House" star was admitted to the emergency room of a New York hospital on Monday, her rep tells People.
"Mary Kate got a kidney infection," said her rep. "She's resting comfortably and will be released in the next day or so."
Mary-Kate, 21, recently told EW.com that she was in good health.
"Mentally, physically, I feel pretty on top of my game right now," she said in September. "Talk to me next week, I don't know. Today, I feel good."