TMZ has learned that Paris Hilton has not only had her sentence cut short, she is already out of jail! Unimpeachable sources tell TMZ the deal was sealed yesterday, and that Hilton made her exit early early this morning. She was originally sentenced to 45 days in jail, but that was reduced to 23. She served a total of three days. The L.A. County Sheriff's Department will hold a news conference in an hour to discuss what went down. Stay tuned.