Nicole Richie and her adorable children attended a birthday bash in Hollywood over the weekend, and by the looks of it, it was a costume party -- Harlow appears to be dressed as a fairy princess while her little brother Sparrow took a few fashion pointers from his rock star dad, Joel Madden! Wonder what the kids will be for Halloween this year?

In other Nicole news, it was just announced that she will be making a return to the small screen. Ryan Murphy tweeted on Friday, “Proud to announce Nicole Richie and the legendary George Takei are joining The New Normal family." While reality TV may have launched her career, Nicole has also appeared on several scripted series, including Chuck, where she played a psychotic former classmate of one of the main characters. Can't wait to see what the Fashion Star judge brings to the table in this one!