Nicole Richie is married

Los Angeles - Nicole Richie and Joel Madden have gone from reality star and rocker to husband and wife.

Richie's publicist Nicole Perna said in an e-mail to The Associated Press on Sunday that the 29-year-old socialite and her longtime boyfriend Madden were married on Saturday in Los Angeles.

31-year-old Madden fronts the band Good Charlotte.

The couple, who dated for more than four years, have a 2-year-old daughter, Harlow Winter Kate, and a 15-month-old son, Sparrow Midnight.

Richie won national attention co-starring in TV's The Simple Life with Paris Hilton and has since been a staple in the tabloids. She has recently taken to writing books and designing clothes.

Richie has her own fashion line, Winter Kate, and a shoe and accessories line, House of Harlow.