This blonde bombshell just shared a childhood photo with her younger sister – who is also famous – to wish her a happy 40th birthday. Who are they?

This huge Hollywood star took to Instagram on Thursday to share a childhood photo with her younger sister to wish her a happy 40th birthday.

The ladies were seen as young, privileged children, photographed in pink and ivory at a fancy dress birthday party in Beverly Hills.

The older sister – seen here wearing a tiara and a magical silver wand – is a blonde pin-up who is friends with Kardashian and Richies.

She rose to fame with a reality TV show and then became a red carpet star. Now she works as a DJ and is a perfume magnate.

Her younger sister is a fashion and style author who lives in New York with her longtime husband and their three children.

Who are they?

They are Paris Hilton, 42, and Nicky Hilton.

Nicky turned 40 on Thursday.

And Paris quickly took to social media to wish her well in the childhood photo.

Her note was sweet.

‘To my eternal partner-in-crime, my confidante and my beautiful sister. Growing up with you has been the most incredible journey.

‘From our childhood adventures to our adult dreams, every moment with you was nothing short of magical.

“On your special day, I am reminded of how lucky I am to have a sister who shines so brightly both inside and out. Your grace, strength and beauty inspire me every day.

“Here we go to celebrate not only the wonderful person you have become, but also the countless memories we have made and the many more to come. Happy birthday, my dearest sister. May your day be as bright and unforgettable as you are. ✨I love you!’

Nicky celebrated with a party in Paris when she posted the fun photos to Instagram after visiting several fashion shows with her older sibling.

The 365 Style author was seen wearing a black sparkly mini dress with her hair pulled back as she sat on a glass-topped coffee table next to several birthday cakes.

‘I couldn’t have asked for a better birthday week in the nicest city with my best friend! Most epic sister’s trip! ❤️” she said of spending time with Paris in France.

Party people: They are Paris Hilton, 42, and Nicky Hilton. Nicky turned 40 on Thursday. And Paris quickly took to social media to wish her well in the childhood photo. At the Stella McCartney show during Paris Fashion Week Womenswear Spring/Summer 2024 in Paris in October

She’s 40! Hilton turned 40 years old on Thursday. She posed with her cakes in France

The star – born Nicholai Olivia – is the wife of James Rothschild of the famous Rothschild family. He is a grandson of Victor Rothschild, 3rd Baron Rothschild.

In May, Nicky, mother of three children, opened up E! News on advice she gave to her sister Paris, who welcomed her first child via a surrogate mother.

‘My advice is always: don’t miss the little moments. There’s such a short window of time that they’re so small, and new things are happening every day,” Nicky said.

“For example, Paris always says her son looks different every day,” Nicky said, adding, “She’s so happy. She’s so happy.’

“I was there last week and just hanging out in the nursery with her and her son, and she’s so complete, that’s the word I would use,” she continued.

Nicky added that Paris’ son Phoenix “looks a lot like me as a baby, and my daughter Lily-Grace looks identical to Paris as a child.”

“So it’s interesting how the genes crossed like that,” she said, adding how interesting it is that she grew up in a family made up of mostly girls, while she, her sister and brother Barron all had boys.

“Funny, we all had girls in the family and this past year my brother had a son, Paris had a son and I had a son,” Nicky said.

“So we’re inundated with guys, and it’s great to see the bond between them,” she added.

Meanwhile, her sister Paris has been “over the moon” since becoming a mother, according to Nicky, who has opened up about her sibling’s journey to parenthood after Paris dropped the surprising news about welcoming son Phoenix Barron with her husband Carter Reum via surrogate back in January – and Nicky is confident the DJ is doing fantastic in the first few months of her new life.

Wow factor: Hilton arrives on the red carpet at the 2023 Latin Billboard Music Awards at the University of Miami, Watsco Center on Thursday

She told PEOPLE: “She is on cloud nine. She is such an incredible mother. She was born for this and I’m so happy for her.’

Nicky is a mother of three children – two daughters and a son – with her husband Rothschild and she hopes the youngsters will bond with their little nephew once they finally meet him.

She added, “I’m so excited for all the cousins ​​and babies to be together. They haven’t all met yet. When my kids have spring break in a few weeks, they’re coming here to meet their new nephew.”

Paris recently revealed she has undergone further IVF treatment in a bid to have a second child – and she wants the baby to be a girl.

In an interview with Glamor magazine, she explained: ‘We’ve done it (the IVF process) seven times… I have all boys (embryos). I have twenty boys.’

She then revealed that the last round of IVF took place earlier this year and they are waiting to see if it was successful. Paris added, “I went through the process again a month ago, so I’m waiting for the results to see if there are any girls.”