UPDATE: Rosie O'Donnell's 17-year-old daughter Chelsea has been found. O'Donnell tweeted the good news, writing, "chelsea has been found and is safe in police custody - thank u all for the help and light #missingchildren."

The original story appears below.

Rosie O'Donnell shared some scary news and sought the public's help on her blog today (August 18), announcing that her 17-year-old daughter Chelsea has been missing since August 11.

In a post succinctly titled "Chelsea O'Donnell Missing," the comedian and former daytime host — or more likely, an assistant working on her behalf — provided the facts about her daughter's disappearance, and details on her last sighting a week ago.

"Rosie O’Donnell’s 17 year old daughter, Chelsea O’Donnell was reported missing. Nyack, New York police authorities have been looking for her in the Rockland County area since Sunday, August 16. She was last seen Tuesday, August 11. She was wearing a black sweatshirt hoodie, dark ripped blue jeans, women’s grey converse sneakers and a black backpack. Chelsea has a large tattoo on her right side of a dream catcher with the word ‘Breathe.’ She left home with her 6 month old therapy dog named Bear. The dog is a 9 lbs brown and black terrier. Chelsea stopped taking her medicine and is in need of medical attention. Any information please contact authorities at 845-358-0206 or 911."

Chelsea is one of O'Donnell's three children from her former marriage to Kelli Carpenter. While the medication the missing teen is in need of isn't specified, a rep for Rosie told US Weekly that "Chelsea, like millions of people, lives with mental illness. It has been a difficult road for Chelsea and her family, and they just want her back safe."

We hope Chelsea soon returns to her family unharmed — and on the off chance you're located in the New York metropolitan area, Rosie has provided a photo of Chelsea and her dog Bear.

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