Mischa Barton reportedly hospitalized after incident at L.A. apartment

Mischa Barton was reportedly hospitalized on Thursday morning after officials responded to a disturbance at her West Hollywood apartment.

People reports that officers responded to "multiple calls around 7:15 a.m.," after which they found Barton and one other person at her home before she voluntarily went to the hospital, where she was allegedly placed under mental evaluation.

SEE ALSO: Scarlett Johansson steps out with husband Romain Dauriac amid split reports

"She was making incoherent statements that made absolutely no sense," a source told E! News.

The former star of "The O.C." had celebrated her birthday surrounded by friends on Wednesday night just hours before the incident.

See photos of Mischa Barton:

22 PHOTOS
Mischa Barton out and about
See Gallery
Mischa Barton out and about
WESTWOOD, CA - OCTOBER 08: Actress Mischa Barton attends the Hammer Museum 14th Annual Gala In The Garden with generous support from Bottega Veneta at Hammer Museum on October 8, 2016 in Westwood, California. (Photo by Donato Sardella/Getty Images for Hammer Museum)
LOS ANGELES, CA - OCTOBER 06: Mischa Barton is seen on October 06, 2016 in Los Angeles, California. (Photo by BG001/Bauer-Griffin/GC Images)
NEW YORK, NY - SEPTEMBER 13: Mischa Barton attends the Chiara Boni La Petite Robe fashion show during New York Fashion Week: The Shows at The Dock, Skylight at Moynihan Station on September 13, 2016 in New York City. (Photo by Theo Wargo/Getty Images for New York Fashion Week: The Shows)
NEW YORK, NY - SEPTEMBER 13: Mischa Barton is seen in Soho on September 13, 2016 in New York City. (Photo by Alo Ceballos/GC Images)
NEW YORK, NY - SEPTEMBER 12: Actress Mischa Barton attends Nolcha Shows New York Fashion Week Women's S/S 2017 presented by InstaSleep Mint Melts at ArtBeam on September 12, 2016 in New York City. (Photo by Brian Ach/Getty Images for Nolcha)
PARIS, FRANCE - JULY 05: Mischa Barton attends the Bulgari Celebration of Magnificent Inspirations, The New High Jewellery Collection during Paris Haute Couture at the Italian Embassy on July 5, 2016 in Paris, France. (Photo by Venturelli/Getty Images for Bvlgari)
CAP D'ANTIBES, FRANCE - MAY 19: Actress Mischa Barton arrives at amfAR's 23rd Cinema Against AIDS Gala at Hotel du Cap-Eden-Roc on May 19, 2016 in Cap d'Antibes, France. (Photo by Ian Gavan/Getty Images)
BERLIN, GERMANY - JUNE 28: Mischa Barton attends the Stylight Awards 2017 at Admiralspalast on June 28, 2016 in Berlin, Germany. (Photo by Chad Buchanan/Getty Images)
CANNES, FRANCE - MAY 17: Mischa Barton attends the De Grisogono Party during the annual 69th Cannes Film Festival at Hotel du Cap-Eden-Roc on May 17, 2016 in Cannes, France. (Photo by Stephane Cardinale - Corbis/Corbis via Getty Images)
CANNES, FRANCE - MAY 16: Mischa Barton attends the 'Loving' premiere during the 69th annual Cannes Film Festival at the Palais des Festivals on May 16, 2016 in Cannes, France. (Photo by Mike Marsland/Mike Marsland/WireImage)
CAP D'ANTIBES, FRANCE - MAY 17: (L to R) Siran Manoukian, Mohammed Al Turki, Toni Garrn and Mischa Barton attend the de Grisogono party during the 69th Cannes Film Festival at Hotel du Cap-Eden-Roc on May 17, 2016 in Cap d'Antibes, France. (Photo by David M. Benett/Dave Benett/Getty Images)
CANNES, FRANCE - MAY 16: Mischa Barton attends the Chopard Party at the 69th annual Cannes Film Festival on May 16, 2016 in Cannes, France. (Photo by Stephane Cardinale - Corbis/Corbis via Getty Images)
CANNES, FRANCE - MAY 16: Mischa Barton is seen at Hotel Martinez during the annual 69th Cannes Film Festival at on May 16, 2016 in Cannes, France. (Photo by Jacopo Raule/GC Images)
CANNES, FRANCE - MAY 15: Mischa Barton visits the Avakian Suite during The 69th Cannes Film Festival on May 15, 2016 in Cannes, France. (Photo by Neilson Barnard/Getty Images for Avakian)
BEVERLY HILLS, CA - APRIL 28: Actress Mischa Barton attends Taste for a Cure Gala at the Beverly Wilshire Four Seasons Hotel on April 28, 2016 in Beverly Hills, California. (Photo by Tara Ziemba/Getty Images)
CULVER CITY, CA - APRIL 24: Actress Mischa Barton attends Safe Kids Day at Smashbox Studios on April 24, 2016 in Culver City, California. (Photo by Jason LaVeris/FilmMagic)
DANCING WITH THE STARS - MISCHA BARTON - The stars grace the ballroom floor for the first time on live national television with their professional partners during the two-hour season premiere of 'Dancing with the Stars,' which airs MONDAY, MARCH 21 (8:00-10:01 p.m., ET) on the ABC Television Network. (Photo by Craig Sjodin/ABC via Getty Images)'n
LOS ANGELES, CA - FEBRUARY 09: Actress Mischa Barton attends NYLON Magazine's Muses And Music Party at No Vacancy on February 9, 2016 in Los Angeles, California. (Photo by Unique Nicole/WireImage)
TORONTO, ON - SEPTEMBER 09: Actress Mischa Barton attends the 2015 Toronto International Film Festival 'AMBI Gala' at the Four Seasons Hotel on September 9th, 2015 in Toronto, Canada. (Photo by George Pimentel/WireImage)
BEVERLY HILLS, CA - AUGUST 27: Mischa Barton attends Barneys New York Fetes Shoe Designer Gianvito Rossi at Barneys New York Beverly Hills on August 27, 2015 in Beverly Hills, California. (Photo by Stefanie Keenan/Getty Images for Barneys New York)
NEW YORK, NY - AUGUST 18: Mischa Barton attends the after party for a screening of Sony Pictures Classics' 'Grandma' hosted by The Cinema Society, Kate Spade and Ketel One Vodka at The Jimmy at the James Hotel on August 18, 2015 in New York City. (Photo by Stephen Lovekin/Getty Images)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

According to TMZ, Barton had been behaving extremely bizarrely in her backyard, where she was uttering nonsensical statements to herself about her mother being a witch, among other proclamations.

Barton was hospitalized in 2009, and later called that incident a "full-on breakdown" in an interview with People magazine.

More from AOL.com:
Taylor Swift stars in sexy 'I Don't Wanna Live Forever' music video alongside Zayn
Mama June documents extensive plastic surgery, body transformation in new show 'From Not to Hot'
John Legend talks about his first-ever Super Bowl ad, social justice and the importance of art

Read Full Story

Sign up for Entertainment Insider by AOL to get the hottest pop culture news delivered straight to your inbox!

Subscribe to our other newsletters

Emails may offer personalized content or ads. Learn more. You may unsubscribe any time.