Mischa Barton is currently under a doctor's care and supervision.
According to multiple outlets, police responded on Thursday morning to calls of a disturbance coming from the actress' West Hollywood apartment.
Insiders tell TMZ that witnesses on the scene spotted the former OC star hanging over her backyard fence and rambling about her mother being a witch.
She was also screaming about the world ending and said something about Ziggy Stardust.
At one point, sources say she fell backward off the fence and yelled:
"Oh my God, it's over! I feel it, and it's angry!"
TMZ writes that Barton was wearing just a dress shirt and a tie during this bizarre incident, though another source says otherwise.
People Magazine quotes a sergeant who confirms Barton was "fully dressed" by the time she agreed she needed professional help.
This same police officer says Barton was speaking in "coherent statements" upon willingly being transported to the hospital for a mental evaluation.
On Wednesday night, Barton celebrated her birthday in Los Angeles with friends.
According to a party attendee, via People, the actress “seemed like she was having a great time" and there was no cause for anyone to be concerned at the time.
This is not the first time Barton has exhibited strange behavior and been placed under a doctor's care as a result.
In July of 2009, a frightened and manic Barton was also rushed to Cedars-Sinai Medical Center.
Unable to control herself and desperate to leave, she threatened suicide and had to be restrained by staff members.
Barton was eventually placed committed to the psych ward for four days under California’s 5150 hold, which means a patient is admitted against his or her will because he or she poses a threat to his or herself self or others.
“It was a full-on breakdown,” Barton told People of that former incident, speaking in 2013 and adding:
“It was terrifying. Straight out of Girl, Interrupted. Story of my life."
Barton also explained to People in this 2013 interview that she had just had her wisdom teeth removed and was taking Xanax.
Yes, she was suffering from a great deal of stress and anxiety at the time - partying, drinking, her career flaming out - but “I was never suicidal,” she told the publication for a cover story.
“I was just overworked and depressed. But one slip of the tongue in a heightened moment and you find yourself in that situation.”
Her time in the psych ward “was an eye-opener,” however.
“I was deeply hurt at first, and then I accepted this was time I needed to be away from work, my family and all the pressure. I had been through the wringer.”
Since then, Barton has remained mostly out of the news.
She did gain a poor reputation on Dancing with the Stars, however, and also came under fire for the way she responded to the shooting of Alton Sterling by the police last year.
The actress has always come across as out of touch, sort of operating in her own universe.
Both TMZ and People reached out to members of Barton's team for a comment after news of this latest incident spread.
They are yet to hear back.
We wish Barton the best.