Nicole Richie had legs for days when she stepped out ... who was seen after the taping in a glittering black sequined dress that hugged her curves — with her own mostly black ensemble.

(Nicole's longtime bestie Paris Hilton wasn't in attendance on her special day, but Richie later showed support for Paris' marriage to Carter Reum at her 2021 wedding.) Even though it took place ...

Sofia Richie ... Nicole, meanwhile, opted for a full length purple Lanvin gown with textured detailing, long sleeves and a turtle neck. She wore her hair loose and complemented the color of her ...