The daughter of American talk show host Rosie O'Donnell has been missing for a week, police have said.
The comedian tweeted that her daughter Chelsea, 17, was last seen on 11 August in Nyack, north of New York City.
She asked for the public's help, and police later said they have been looking for the teenager since Sunday.
chelsea and her dog bear - last seen in nyack ny - may be in NYC - please call 845-358-0206 or 911 pic.twitter.com/1jXbNxravZ— Rosie (@Rosie) August 18, 2015
Chelsea, who is Ms O'Donnell's adoptive daughter, had stopped taking prescribed medication when she went missing and was accompanied by her therapy dog.
"Chelsea, like millions of people, lives with mental illness," said a spokeswoman for Ms O'Donnell, Cindi Berger.
"It has been a difficult road for Chelsea and her family and they just want her back safe."
She was last seen wearing a black hooded sweatshirt, ripped blue jeans, grey Converse sneakers and a black rucksack.
She has a large tattoo of a dream catcher on her right side with the word "Breathe" in it.
The dog is a six-month-old black terrier called Bear.