Although rumors of an impending wedding between new parents Nicole Richie and Joel Madden have been floating around for months, OK! can exclusively tell you that the couple definitely plans to make it official very soon.

A source close to the pair, who celebrated the birth of their first child, Harlow, on Jan. 11, tells OK! that the wedding plans are already in the works. “I can’t give too much away,” explains the friend, “but I can say is that it will be this summer.”

The source did reveal that invites for the blessed event are set to go out next week and the source confirms that a celeb party planner is already getting everything together for the nuptials. He’s already tasting cakes in New York City at The Simple Life star’s favorite bakery, Alice’s Tea Cup. “She loves it there,” says the source.

Blushing bride Nicole will have eight bridesmaids — no word if Paris Hilton will be among them.

Everything has basically been planned out except for what the happy couple, along with their daughter, Harlow, will wear to the wedding. “At this point, they’re just trying to get dresses together.”

Source: OK! Magazine