Joel Madden & Nicole Richie

According to an announcement posted on Good Charlotte’s official website, rocker Joel Madden and his socialite girlfriend Nicole Richie are expecting a new baby!

“What’s better than winning an Oscar? I am so happy to tell everyone that Harlow is going to be a big sister!” Madden wrote in the posting. “God has truly blessed my family. Hope you’re all feeling as good as I am right now.”

The couple welcomed daughter Harlow on January 11, 2008. Richie, 27, and Madden, 29, have been together since December 2006.