Nicole Richie and Joel Madden are expecting again!

The couple — already parents to one-year-old daughter Harlow — announced that Richie is pregnant again on Madden’s Good Charlotte blog, Saturday night.

See some of Hollywood’s biggest baby bumps.

“What’s better than winning an Oscar?” Madden wrote. “I am so happy to tell everyone that Harlow is going to be a big sister!”

See how Nicole…