Enlarge Sheriff's Headquarters Bureau via AFP/Getty Images Paris Hilton has been "reassigned"; she'll now serve 40 days of home confinement.

After meeting with medical officials, Hilton has been "fitted with an ankle bracelet and is confined to home for 40 days," said Steve Whitmire, spokesman for the Los Angeles Sheriff's Department.

The Sheriff's Department held a hastily-scheduled morning news conference at the Century Regional Detention Facility in Lynnwood, where Hilton has been serving a jail sentence since late Sunday. The heiress was caught in February driving on a suspended license, a violation of her probation for an earlier arrest for an alcohol-related reckless driving.

Hilton surrendered to officials late Sunday, just hours after she was on the red carpet at the MTV Movie Awards. She was expected to begin serving her time on Tuesday. Up until Thursday morning, the inmate was still expected to be released June 26.

The Simple Life star, 26, was sentenced to a 45-day jail sentence, which was expected to end up being 23 days. The judge who sentenced Hilton specified that she could not substitute work release, community service or home detention for time behind bars.