Nicole Richie and Joel Madden have reportedly tied the knot, insiders spill to RadarOnline.com.

The couple – who celebrated the birth of their second child, son Sparrow James Midnight, last month – reportedly secretly wed in an intimate service on Wednesday, after obtaining a marriage licence last week.

A spokesperson for the couple – who also have a 21-month-old daughter Harlow – has yet to comment on the reports.