Lindsay Lohan's stint in the slammer could be as short as two weeks.
ABC News affiliate KABC TV in Los Angels has learned the actress, who began her sentence today at the Century Regional Detention Center in Lynwood, California, has a projected release date of Aug. 2. Earlier this month, she was sentenced to 90 days in prison and 90 days in-patient rehab for violating her 2007 probation.
Lohan could spend more time in jail because Beverly Hills Judge Masha Revel ruled out work release or electronic monitoring in her probation violation case.
ABCNews.com's calls to the L.A. County Sheriff's Department were not immediately returned.
Ten minutes late, clad in sunglasses that couldn't hide a steely glare, Lohan marched past a throng of photographers and glitter-throwing fans today for a pre-prison court hearing.
She sat through a brief courtroom discussion before Revel ordered that all cameras be shut off for Lohan's handcuffing. The actress stood, placed her hands behind her back, and let two deputies cuff her and lead her out of the courtroom without making a scene.
Not so for her estranged father. Michael Lohan shouted, "We love you, Lindsay," as she was escorted out. Lohan's mother, Dina, and younger sister, Ali, also watched as she was taken into custody.
From the courtroom, Lohan went to a courthouse holding facility before shipping off to the Lynwood facility. Before leaving the courthouse, she swapped out her jeans, sleeveless top, cropped jacket and corset belt for her new, albeit temporary, wardrobe: an orange jail jumpsuit.
Shawn Chapman Holley, who resigned as Lohan's lawyer after her July 6 sentencing, represented the actress at the hearing. She addressed reporters afterwards, saying that she stepped back into the Lohan case when the actress decided she did not want famed O.J. Simpson attorney Robert Shapiro to represent her.
"She's stepped up, she's accepted responsibility," Holley said about Lohan. "She's scared as anyone would be, but she's as resolute and she's doing it."
Lohan's surrender came two weeks after her tearful sentencing hearing, in which she sobbed as Judge Revel handed down her sentence.
Lohan will serve her time at the same facility that housed Paris Hilton in 2007 and will be segregated from the general jail population. At most, she may only end up serving 23 days of the 90-day sentence. At the July 6 hearing, L.A. County Sheriff's spokesman Steve Whitmore noted that "female, non-violent prisoners will do about 25 percent of their sentence" because L.A. jails suffer from "an overcrowding situation."
At a news conference outside the Lynwood facility today, Whitmore said Lohan "has been extremely cooperative" so far.
"As with any inmate, Lohan was treated just like any other," he added, noting that most inmates don't draw throngs of paparazzi. "Inside it's business as usual."
Her time in prison won't be posh. Lohan will swap her plush bed for a vinyl mattress and her sprawling home for a 12-by-8 foot cell. She won't be able to smoke in jail or wear makeup.
According to a former inmate, today will be brutal for the 24-year-old starlet.
"It is something you will never forget," former inmate Tanya told "Good Morning America" today. "When you get strip searched it takes away a lot of dignity. You are not in a room by yourself."
But ABC News legal analyst Dana Cole said that for most of her time behind bars, Lohan will just be bored.
"It's not going to be the worst situation imaginable, far from it," Cole said, noting that she'll be separated from other inmates for her own protection. "It's just going to be boring basically."
At least Lohan will be cooped up with someone she knows -- sort of. The Los Angeles Times reported today that one of Lohan's inmates at the Lynwood jail is 19-year-old Alexis Neiers, whose "bling ring" of accused burglars targeted celebrity residences, including Lohan's Hollywood Hills home.
Neiers is currently serving a 180-day sentence for felony first-degree residential burglary of actor Orlando Bloom's home.
Of course, because Whitmore noted that Lohan "will be kept away from [the] general population" of the jail, they may not meet at all.
The days leading up to Lohan's surrender were anything but serene. According to People magazine, she spent a stressful weekend at the Pickford Lofts sober living facility in L.A.
"She has not been able to sleep and has barely been eating. All weekend, Lindsay kept crying, chain smoking and chewing her nails," a source told People. "She is a nervous, fidgety mess, and her legal team, family and friends are very concerned about her fragile state."
But the night before heading to court and then jail, Lohan seemed at least a little lighthearted. On Twitter, she wrote "the only "bookings" that i'm familiar with are Disney Films, never thought that i'd be "booking" into Jail... eeeks."
She also retweeted an ABCNews.com story about pets victimized by the BP oil spill.
Lohan is scheduled to be released from jail in time for the premiere of her newest movie, "Machete," in which she plays a gun-toting nun.
This will be Lohan's second time in jail. She spent 84 minutes in prison in 2007 after pleading guilty to two misdemeanor counts of being under the influence of cocaine and no contest to two counts of driving with a blood-alcohol level above 0.08 percent and one count of reckless driving.
The year 2007 was also the year of two very public arrests for Lohan. She was sentenced to three years of probation but requested a one-year extension in October after failing to complete her alcohol-education courses on time.
ABC News Radio's David Alpert contributed to this report.