"The Simple Life" just got more complicated for Nicole Richie: She's a first-time mom.

Richie, 26, gave birth Friday at Cedars-Sinai Medical Center to a daughter named Harlow Winter Kate Madden, People magazine reported on its Web site.

The father is Richie's 28-year-old boyfriend, Joel Madden, of the rock group Good Charlotte.

"We are very blessed she's healthy and beautiful and so good already," Madden told People on Saturday. "We are very happy."

Calls to the couple's representative at Handprint Entertainment, Richie's publicist and the hospital were not immediately returned Saturday.

Richie, the socialite daughter of singer Lionel Richie, is perhaps best known for costarring with Paris Hilton in the reality show "The Simple Life."

Last year, she spent 82 minutes in jail after being convicted of driving under the influence of drugs. She was arrested in December 2006 after witnesses reported seeing her Mercedes-Benz SUV headed the wrong way on a freeway in Burbank.