Rosie O’Donnell has reported her 17-year-old daughter Chelsea O’Donnell missing, revealing that she has been gone since Aug. 11.

Chelsea O’Donnell Missing

O’Donnell revealed that Chelsea was missing in a post on her website, Rosie.com. According to the post, Chelsea was last seen in Nyack, N.Y., on Aug. 11 with her black terrier therapy dog, Bear.

“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,” reads the post on O’Donnell’s website. “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,'” the post continued. “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.”

A rep for O’Donnell revealed that Chelsea suffers from a mental illness, though did not elaborate as to the exact nature of the illness.

“Chelsea, like millions of people, lives with mental illness,” the rep told Us Weekly. “It has been a difficult road for Chelsea and her family, and they just want her back safe.”

O’Donnell adopted Chelsea with her first wife Kelli Carpenter, with whom she also had Blake and Vivienne O’Donnell. The actress and former talk show host is also a mother to adopted son Parker, her eldest, and 2-year-old daughter Dakota from her marriage to Michelle Rounds.

Police have yet to classify Chelsea as a missing person and have no information on her therapy dog or the teenager’s medication. Though it seems that Chelsea ran away from home, according to TMZ, investigators are looking into the case.