The birthday girl, meanwhile, wore a slinky gold Saint Laurent slip dress ($4,900) and Sofia, who welcomed her first baby in May, chose a tartan Saint Laurent blouse ($5,556) with black trousers.

"So much fun celebrating with my Virgo Queens," Paris wrote in the caption Paris Hilton had a great time celebrating her friend Nicole Richie! On Sunday, Sept. 22, the socialite, 43, shared a set of glamorous photos from her former The Simple Life costar’s 43rd birthday party on Instagram.

Paris Hilton celebrated Nicole Richie’s birthday in a sheer velvet dress. The LBD was “sliving” and trendy, as mesh and lace pieces made a grand comeback at the event. Blending mesh and velvet beautifully,

Paris Hilton and Nicole Richie, the iconic duo from the reality TV show "The Simple Life," reunited to celebrate Richie's 43rd birthday in style. The glamorous party was a testament to their enduring friendship and the enduring appeal of their dynamic duo.

Paris Hilton wished Nicole Richie a happy 43rd birthday with a video tribute showing them having fun together on 'The Simple Life' and shooting the new reboot together.

Paris Hilton celebrates longtime friend Nicole Richie's birthday. The 'Simple Life' star took to Instagram to share videos of her sharing highlights and paying homage to her friend on her special day.

Paris Hilton is showering her longtime best friend, Nicole Richie, with love as she turns 43.The reality TV star, 43, marked the occasion by sharing a heartwarming video tribute for Richie