Nicole Richie and her daughter, Kate Madden, made a rare red carpet appearance together at the Los Angeles premiere of Stop! That! Train! alongside a host of celebrities, including Tom Daley and RuPaul. The duo's appearance was a striking visual, as they looked like twins. While Nicole opted for a full-length navy-and-white polka-dot dress with a matching headscarf and a white fur coat, her daughter arrived in a strapless black minidress with knee-high boots and dainty jewelry. Kate's long dark locks were worn down to her waist, and she added dark eye makeup to complete the look. This was the first time the duo had graced the red carpet together since April 2024, when they were joined by Nicole's husband, Joel Madden, and their son, Sparrow, at a film premiere. The 18-year-old Kate has been slowly coming out of her shell and sharing insights into her life with fans on social media, including a recent post about her Coachella trip. Just like her mother, Kate is incredibly independent and chose to forgo her birth name, Harlow, from an early age. She has been going by her middle name, Kate, since first grade, and everyone who knows her calls her by this name. Nicole and Kate are incredibly close, and the fashion designer shared on Today that teenagerhood is her favorite stage to parent. She finds it fun and wild to remember her own teenage dramas and share them with her daughter. Kate and Sparrow are also aware of Nicole's party girl past and her antics on the hit show The Simple Life alongside her friend, Paris Hilton. Nicole has always been very open and honest with her kids, and she hopes they are the same with her. This rare red carpet appearance highlights the close relationship between Nicole and Kate, and it's a testament to the strong bond they share.