Credit: LA Sheriff's Department

Dressed in an orange jumpsuit, Lindsay Lohan cracks a slight smirk in her just-released mug shot.

The 24-year-old actress -- who surrendered to police Tuesday to start a 90-day jail term for violating her probation in a 2007 drunken driving and cocaine possession case -- was booked around 10:11 a.m. at Century Regional Detention Facility in Lynwood, Calif.

According to her booking sheet, the 5'6" star weighs 118 lbs.

L.A. sheriff's spokesman Steve Whitmore says Lohan "has been extremely cooperative" so far. "Everything is going smoothly."

Though she received a 90-day jail sentence, Lohan's slammer time will likely be reduced due to overcrowding. Whitmore said a "projected release date" could be announced sometime today.

Lohan's lawyer, Shawn Chapman Holley, told reporters the actress is "scared as anyone would be ... and she's resolute. She does her time just like anyone else."