Paris Hilton completed the first night of her probation sentence as morning arrived Monday in her new surroundings _ a Los Angeles County jail cell that will be her home for much of this month.

The 26-year-old hotel heiress worked the red carpet at the MTV Movie Awards on Sunday afternoon, then traded her strapless designer gown for a jail-issue jumpsuit and a solitary cell.

Hilton entered the Century Regional Detention Facility in Lynwood just after 11:30 p.m. to serve 23 days for violating her probation in an alcohol-related reckless driving case. She is due out on June 26