Despite their coy efforts to keep it a secret, In Touch can confirm that Ashlee Simpson and Pete Wentz will tie the knot on May 17. “It’s going to be a small, intimate gathering,” an insider says. On May 8, at a performance for troops at California's Camp Pendleton, Jessica Simpson announced that she will be her little sister’s maid of honor.

In Touch was the first to break the story of Pete and Ashlee’s engagement, after Pete popped the question in Colorado. Then the couple announced it on friendsorenemies.com: "Yes, we are thrilled to share that we are happily engaged. Thank you for all of your support and well-wishes — it means the world to us.” And although Ashlee remains mum about a possible pregnancy, insiders insist that she's expecting. “They’re keeping it quiet because they want to get married first,” another insider reveals.