Now this is our kind of sister act!
Motherhood looks good on Nicky Hilton Rothschild -- and becoming an aunt isn't so bad for Paris Hilton, either!
The siblings pulled the ultimate sister act in their first big public outing since Nicky gave birth to her first child, daughter Lily-Grace, in July, hitting up a ton of fashion shows and soirees at New York Fashion Week.
WATCH: Nicky Hilton Steps Out With Newborn Daughter Lily-Grace Just 3 Days After Giving Birth
The ladies attended Jeremy Scott's Moschino runway show on Sept. 12, where they excitedly sat next to each other in the front row. Paris, 35, rocked a very New York all-black ensemble, which she
punched up with a fun Powerpuff Girls cross-body bag, while Nicky, 32,
showed off her insanely fit post-baby bod in a bright red floral tank dress.
And, of course, they snapped pics at the show.
Backstage, they hugged it out with Scott and snagged their own runway-worthy photo. "Backstage at @itsJeremyScott's @Moschino show with this #HotMama @NickyHilton. ❤️?❤️ #NYFW," Paris captioned her Instagram pic.
WATCH: Paris Hiton, Katy Perry and More Party at Burning Man
They later changed into nighttime looks for a couple of different NYFW fêtes, with Paris slipping into a latex crop top and leather pencil skirt, which she paired with a choker and zippered boots, while the new mom looked party-ready in a sequined black-and-white striped mini, pointy heels, and high ponytail.
They posed for portraits on a yellow background at the W Magazine and Hugo Boss Celebration of The Shot at the International Center of Photography Museum, where they gave the Kardashian and Jenner sisters a run for their money in the tightest siblings department.
"So happy that I have a sister & best friend forever all wrapped into one amazing woman! ???," Paris captioned this sweet Instagram snap.
And just try not to feel like you're back in the aughts with this portrait the pair took at the Zana Bayne and Other Stories Co-Lab Collection celebration at Narcissa.
That sultry pose is peak Paris, though this Instagram snap Nicky took of her big sis on the stairs is a pretty close second.
This wasn't their only fashionable outing of the week, however. Last Thursday, the duo stepped out in head-to-toe black outfits to take in the CR Girls Exhibition by Sante D'Orazio in NYC.
PHOTOS: Nicky Hilton Takes Baby Lily-Grace Out for Stroll in Chicest Stroller Ever
Ever the doting sister, Paris threw Nicky a picture-perfect baby shower in NYC in June, Nicky's second of the summer. "Makes me so happy to see my sister so happy, beautiful & glowing," the former reality star captioned the snap with her little sis. "? So excited for her starting her new family. ???? #Blessed."
Find out more about the swanky affair in the video below.
