(July 8) — In less than two weeks, actress Lindsay Lohan will trade in her designer tops and chic leggings for a short-sleeved prison jumpsuit as she begins a 90-day stint at the Century Regional Detention Facility in California.

And the new digs themselves are far from what the celebrity fashionista is accustomed to — as other high-profile inmates, including socialites Paris Hilton and Nicole Richie, found when they stayed in the Los Angeles prison, experts say.

This frame from video provided by KCBS-TV in Los Angeles shows the interior of a typical jail cell that would be the home of Paris Hilton at the Century Regional Detention Facility in the Los Angeles suburb of Lynwood, Calif. 

“[Lohan’s] stay there will be unpleasant enough that she won’t forget it,” says Steve Cron, a criminal defense attorney in Santa Monica, Calif. “The point is to say, ‘You better take this seriously, and if you don’t, you are going to keep going back and forth to jail.'”

On Monday, Superior Court Judge Marsha N. Revel sentenced the 24-year-old actress to 90 days in jail for violating the terms of her probation, which followed a 2007 drunken driving arrest. Lohan was ordered to begin her incarceration on July 20, as well as to spend 90 days at an in-patient addiction treatment center upon her release.

According to Cron, Lohan’s new accommodations will be vastly different from her posh West Hollywood apartment. She’ll be staying in a 12-by-8-foot room with a bunk, table, sink, toilet and a small window.

“Because of her celebrity status, she will have her own cell,” Cron said. “That’s not to say she’s being treated better than anybody — it’s for her safety. All celebrities can be victimized in jail by people who want street cred for beating up someone who is famous.”

Lohan may have her own cell, but she won’t have much by way of everyday amenities. “There are no televisions inside the cells, and inmates can’t have makeup,” Cron said. “Not that it’s a facility in which your looks are of importance anyway. In fact, you may want to look a little less attractive when you’re in jail.”

There won’t be a phone in her cell, but Lohan will have access to a pay phone for a limited number of hours each day. Since she’ll be locked up in her cell 23 hours a day, she’ll most likely be looking forward to the weekend, when friends and family members can visit her.

“Her lawyer can have access to her seven days a week, but others can only visit her once a week,” said Cron. And even then, the interaction will be limited: “She’ll be behind glass talking through a phone, so [guards] don’t have to worry about security or somebody giving her something.”

Lohan will be permitted to go outside her cell for one hour a day to exercise and be outdoors, weather permitting.

“It doesn’t mean going to the park,” Cron explained. “She’ll still be inside a walled facility. She’ll get to see the sun or the smog, as it were, and get some fresh air and a little vitamin D, but she won’t be out wandering around.”

As for the food served at the jail, former inmate Hilton described it as less than desirable during a 2007 appearance on “Late Show With David Letterman.”

“Dinner was jail mystery meat,” she said. “I have no idea what it was, but it was pretty bad.”

The heir to the Hilton hotel chain fortune served less than a month at the Century Regional Detention Facility in 2006 for violating the terms of her probation on a reckless driving charge. Richie, Hilton’s on-again-off-again BFF, also spent time at the jail — albeit a mere 82 minutes — the following year for driving under the influence of drugs.

While Lohan’s life behind bars might not be glamorous, she can at least rest easy knowing she probably won’t have to serve the entire 90 days, Cron noted.

“The rule is that they can’t keep you for more than two-thirds of the time, as long as you get credit for good behavior,” he said. “The jail is so overcrowded that people, by and large, are doing 25 percent to 50 percent and rarely much more than that.” By that math, Lohan could be released in about 23 days.

But instead of taking a vacation after she’s released, Lohan will go straight to rehab, where she’ll spend 90 days at an in-patient addiction treatment center.

“When she goes into treatment, the main thing is getting her off drugs,” said Los Angeles-based addiction expert Marty Brenner. “She’ll need to be evaluated, and she will need group and one-on-one sessions, but, most importantly, she’ll have to learn how to change.”

According to a probation report released Wednesday, Lohan is on a slew of prescription medications for pain, depression and anxiety.

“This is a girl who shows signs of an addictive personality,” Brenner said. “She hasn’t taken any of this seriously, and if you don’t do that, [treatment’s] not going to work. The whole thing is about changing your actions, your behavior, your friends [and] your outlook.”

Whether Lohan will ever admit to having a problem remains to be seen, but there is a possibility that the jail stint might be the wake-up call she needs, Brenner said.

“When you are medicating your life with drugs, your outlook becomes distorted. Maybe after jail her attitude will change. If it doesn’t, she’s in trouble.”