Update, Wed 9 AM: Paris Hilton goes public Wednesday night.
The hotel heiress is to tell about her three-week jail stay and talk about her future on CNN's "Larry King Live."
Hilton hasn't spoken to the media since being released from jail, but she has given some hints about what her future could include.
She told E! News from jail that she would like to build a transitional home for inmates, so they don't have to go back to the street after they're released.
The 26-year-old celebrity has also said she wants to change her image. She told Barbara Walters soon after she arrived in jail that she no longer sees acting dumb as "cute" or a proper role model for teens.
Hilton also said she was "shocked" by the media attention she's drawn.
Update, Tue 8:30 AM: Paris Hilton may be out of jail, but she's still on probation for driving on a suspended license.
The hotel heiress can complete her probation in March 2009 if she keeps her driver's license current and doesn't break any laws. Officials say she can reduce that time by 12 months if she does community service that could include a public-service announcement.
The hotel heiress walked out of the jail in Lynwood, California, to a big horde of cameras and reporters shortly after midnight Los Angeles time. She had a big smile on her face as she walked to the SUV where her parents were waiting.
During her three-week stay at the all-women's facility, Hilton was mostly confined to a solitary cell in the special needs unit away from the other 2,200 inmates.
Hilton was initially sentenced to 45 days in jail, but was released early for reasons that included good behavior.
Previously: Dealing with jail time for driving offenses was difficult, but now Paris Hilton faces the aftermath.
The 26-year-old heiress is expected to be released from a Los Angeles County women's jail early this week and will give her first post-jail TV interview to "Larry King Live" Wednesday at 9 p.m. ET.
Hilton has professed in letters and phone interviews to want to change her partying ways. No doubt the trail of photographers who constantly pursue her will show the world if she's serious.
"I would like to make a difference," she told Barbara Walters. "God has given me this new chance."
Saying it is one thing and doing it is another, said Dorian Traube, a professor of social work at University of Southern California.
"If this indeed has changed her, then the transition will be very difficult because she'll have to find a new purpose in life" beyond being queen of the party scene, Traube said.
"Her life will have to change drastically, which is going to be tricky because she's going to be in the public eye more than ever."
So long as she keeps her driver's license current and doesn't break any laws, Hilton will complete her probation in March 2009. She can reduce that time by 12 months if she does community service or records a public-service announcement, the city attorney's office said.
But Hilton and her family have hardly shied away from the media during her time behind bars.
That constant attention, along with society's "sick fascination with failure," will make Hilton's transition more challenging, Traube said.
"She has almost set herself up to fail because there's been so much talk about how she's a changed person, how she found religion, and she prays all the time," she said.
"People are bitter for the notoriety she has for having done very little other than party, so they're standing around waiting for her to fail."
Abandoning her party-girl image, stamped by her appearance in a sex video, in favor of a philanthropic one will bring emotional costs, too, said psychologist Jeremy Ritzlin, who ran a halfway house for recently released federal prisoners.
Hilton will be frustrated as she learns "whether she can rein herself in or not without it making her too crazy," he said.
"She's not going to have an easy time adjusting because she's led a hedonistic life of escapism where she doesn't have to deal with who she is and what her problems are in the world."
Making a public service announcement against drinking and driving would be a good move for Hilton, said David Brokaw, a longtime Hollywood publicist.
"That would say she's serious" about changing, he said.
"The American people don't hold a grudge if somebody genuinely says 'I was wrong, I made mistakes, I'm sorry,'" Brokaw said. "If she says that and it's verified by what she does, then she's on her way to maybe even better acceptance and interest than ever before."
Hilton told E! News last week that she plans to build a "transitional home" to help recently released inmates readjust to freedom.
"These women just keep coming back (to jail) because they have no place to go," Hilton said. "It's a really bad cycle, and if we stop it now, we can make our community a better place."
She said she is "much more grateful" after spending time in jail.
"I appreciate everything now, and I think there was a lot of bad people that I was around," she told E! "I don't want to surround myself with those types of people anymore."
Excerpts from his 10-minute interview with the millionaire socialite, who was sentenced to 45 days in jail for violating her probation in a drunken-driving case, were published by the cable channel's Internet affiliate, E! Online which airs Hilton's "Simple Life" show.
Only time will reveal whether Hilton has really changed, said veteran publicist Michael Levine.
"The soap opera, where it's been filled with drinking and drugs and porn videos, is very, very popular and compelling," he said. "If she turns the story to another, will it remain popular?"