“Extra” has learned that Nicole Richie has enrolled in an alcohol education program.

Nicole’s enrollment is part of her guilty plea to DUI. She’s now signed on for an 18-month anti-drinking course.

Her program reportedly includes more than 50 hours of group counseling, weekly face-to-face interviews and 12 hours of alcohol education.

The socialite, who is now six months pregnant with her first child, was arrested for DUI in December after driving the wrong way down an L.A. freeway. It was her second DUI offense.

Since the incident, Nicole has said that she felt like “the worst person in the world” and knows she “could have killed somebody.”

She has now sworn to take care of herself and her unborn baby with boyfriend Joel Madden. Joel, front man for the band Good Charlotte, has said he plans to marry Nicole.