Celebrity Celebrity Birthdays Paris Hilton Shares Matching Throwback Photos to Celebrate Sister Nicky’s 41st Birthday: 'Twinning' The younger Hilton sister turned 41 on Saturday, Oct. 5 By Gabrielle Rockson Gabrielle Rockson Gabrielle Rockson is a staff writer-reporter for PEOPLE. She joined PEOPLE in 2023 and covers entertainment and human interest stories. She's interviewed David Beckham, Zendaya, Timothée Chalamet and many others. Her previous work can be found in OK! Magazine, MyLondon, GRM Daily, and more. People Editorial Guidelines Published on October 8, 2024 08:07AM EDT Nicky Hilton and Paris Hilton as children. Photo: Paris Hilton/Instagram Paris Hilton is celebrating her little sis! The DJ and heiress, 43, marked her sister Nicky Hilton’s 41st birthday — which she turned on Saturday, Oct. 5 — by sharing a carousel of throwback photos on Monday, Oct. 7, of the pair sporting matching outfits. “Twinning since Day 1👯♀️ Happy Birthday to my beautiful sister @NickyHilton! 🎂🎉,” Paris began in her caption alongside a photo of the duo sporting matching gold and black outfits as kids. In the shot, the sisters donned straight faces to the camera as they sat on a blue couch. “Since the beginning you have been by my side, my partner in crime, best friend, and confidant,” Paris continued. “You’ve always been the one I look up to, and I’m endlessly proud of everything you accomplish as a wife, mother, and total boss babe 👑✨.” Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories. Paris Hilton and Nicky Hilton as children. Paris Hilton/Instagram Kathy Hilton Jokes 'Fashionista' Daughter Nicky Would Guard Her Closet When She Was a Kid (Exclusive) The following snaps featured the sisters wearing more twinning outfits, including blue dresses, red outfits, white furry coats and large T-shirts. Paris also included photos of the duo in their adult years sporting matching dresses, tank tops and sparkly outfits. Nicky Hilton and Paris Hilton as children. Paris Hilton/Instagram The PEOPLE Puzzler crossword is here! How quickly can you solve it? Play now! “I can’t imagine life without you🥹,” Paris added. “Can’t wait for more fun , laughter, adventures, and unforgettable memories together! 👯♀️ I love you so much and I’m so lucky to have you as my sister💫.” Commenting her appreciation, Nicky wrote under the post, “Wow. We really do have a lot of twinning moments! 👯♀️ 😹🫶 Love youuu!” Nicky Hilton Reveals Her Marriage Rules with Husband James Rothschild — and How Their Kids Play a Part (Exclusive) Paris and Nicky’s mother Kathy Hilton also shared a birthday message to her younger daughter. “Happy birthday to my baby girl @nickyhilton congratulations on your @rebeccavallance launch!,” the 65-year-old wrote under a carousel of photos from Nicky and Rebecca Vallance’s Holiday collection launch. “Dad and I are so proud of you 💕💕💕 thank you to @mytheresa.com for making this special night happen 💕🥳.” In the first picture, the Hilton ladies posed alongside family friend Kris Jenner and creative director Rebecca Vallance-Gasan. Their father Rick Hilton, brother Conrad Hilton and actress Emma Kenney joined in the following snap. Close