It’s baby time again for Nicole Richie and her rocker boyfriend, Joel Madden, is reporting.

The Jan. 12 issue of the magazine reports that as their daughter Harlow gets ready to celebrate her first birthday, reformed party girl Nicole is taking vitamins, eating healthy and designing trendy maternity wear in preparation for her second pregnancy.

“Nicole simply told Joel that she wants another baby — right away,” a friend confides to Star. “He was a little overwhelmed at first, but now he’s with her 100 per cent. They’re both thrilled about adding to their family.”

And, after overcoming a rocky period in their relationship, the couple seems to be in a good place to expand their family.

Nicole and Joel went through a “rough patch, but now things are amazing between them,” says a source. “Nicole knows it’s because they’re both so happy with Harlow, and she truly believes another baby will double their commitment.”