LOS ANGELES (Reuters) - Socialite Nicole Richie has reached a plea deal on charges of driving under the influence of drugs and alcohol and was expected to be sentenced on Friday to a short jail term, celebrity news site TMZ said.

Richie, 25, the co-star of "The Simple Life" with Paris Hilton, was stopped by police in December after she was seen driving the wrong way on a Los Angeles freeway. It was her second charge of driving under the influence in four years.

Other Los Angeles media said Richie was expected to arrive in court in the Los Angeles suburb of Glendale on Friday morning. If convicted, she could face a jail sentence ranging from four days to one year.

Richie is the daughter of singer Lionel Richie. Media interest in Richie's case spiked after celebrity magazines reported she is three months pregnant and plans to marry her boyfriend, Joel Madden of the band Good Charlotte. Richie's publicist has declined to comment.

Hilton spent three weeks behind bars last month for violating probation in a drunken driving case.