Paris, 43, looked elegant in a flattering and long green-and-red dress and Nicky, 40, showed off her post-baby body in a shimmering pale blue minidress that highlighted her toned legs.

Also at the event were Kelly Day, Stacey Bendet, Lauren King, Crystal Minkoff, Christine Chiu, Alexandra Von Furstenberg, Bijou Phillips, Nancy Davis, Dylan Mulvaney.

Also seen were Bernie Leonard, Rachel Zoe, Tina Craig, Tracey Cunningham, Vanna White.

Other pals included Carol Bell, Andy Gelb, Alex Baskin, Nikki Haskell, Anna Zuckerman, Irena Medavoy, Zoe de Givenchy, Sarah Howard, and Omar Shariff, Jr.

Kathy Hilton was thrown a fun birthday party by her daughters Paris and Nicky Hilton this week

Nicky and Paris hosted the celebratory birthday dinner party.

The gorgeous florals were seen all throughout the home and designed by Kathy’s longtime florist J’Adore Les Fleurs.

Kathy’s friends enjoyed Double baked potatoes by The Caviar & Co., and beef tenderloin prepared by Kathy’s chef, Chef David as well as a very special Lily of the Valley and Pink Bow birthday Cake commissioned by Crumbles Patiserie.

There were also macaroons in Kathy’s favorite flavors by Lolli and Pops.

Casa del Sol tequila strawberry margarita and rose champagne flowed through out the night.

Paris and Nicky planned the event with long time family friend, Carol Bell.

Gift bags were shared.

An Anna Zukerman Jewelry Claw Machine was on hand for guests to play with and all guests received teddy bears with Anna Zuckerman Jewelry.

Additionally, the fragrance of tomorrow land flowed throughout the home from the abundance of Baobob Collection Candles that was at each place setting.

Last week Kathy got warm wishes from friends and family.

Paris and Nicky, sister Kyle Richards, 55, and pal Kris Jenner, 68, all shared birthday messages for the socialite.

Kathy wore a white gown with pink shoes as she posed with her husband Rick Hilton of Hilton & Hyland

They shared a sweet smooch too. They have been married since 1979

Paris – who blasted her uncle Mauricio Umansky for sharing the toxic reason behind their family feud – shared a sweet post for her mom.

‘Happy Birthday to the OG Queen, my mom @kathyhilton! ✨’ began the reality TV star.

‘Mom, your resilience and compassion have taught me everything I know about navigating life with a smile, a heart full of love and a touch of sparkle✨, ‘she wrote.

‘You’ve always been my rock, my inspiration, and the coolest mom anyone could ever wish for. On your special day, I just want to say thank you for being you—genuine, loving, and simply irreplaceable,’ she gushed.

‘Celebrating you today feels like an homage to the incredible impact you’ve made, not just on me, but on everyone lucky enough to be in your orbit.

‘Here’s to more laughter, more unforgettable moments, and yes, more late night prank call parties in the living room. May this year bring you as much joy and happiness as you bring to everyone around you.  Love you to the moon and back,’ Paris finished.

Kathy looked like a proud fur parent as she held up two small dogs

Nicky was seen far left with Stacey Bendet (in the headband), a fashion designer, founder, CEO, and creative director of Alice + Olivia, a contemporary clothing company based in New York City

Kathy smiled with a pal who was in black and white

Nicky shared several photos of herself with her mother looking very fashionable as well as photos with her sister and wrote a much shorter caption than her sister.

‘Celebrating the queen of grace, laughter, and endless love on her birthday. Happy Birthday to my incredible mom @KathyHilton!✨We adore you!’

The Kardashians star shared three images of herself with Kathy to her Instagram Story.

‘Happy birthday @kathyhilton! Thank you for so many years of friendship,’ she captioned the post.

The reality TV icon looked at her birthday cake which had a picture of her in pink ad an image with her girls

Stacey gave a speech for Kathy as Paris looked on

Hilton seemed thrilled with her cakes

J’Adore Les Fleurs left and Baobab candle right

Banquet tables and chairs were set up in the party room

There was a spring theme and goody bags for all who attended

Rachel Zoe, stylist to the stars and designer, held up a bear that came out of the claw machine

Zoe wore all black as she flashed her pretty gold rings

Kyle also shared her tribute to her Instagram Story, sharing a video of her sister being, in her own words, ‘iconic’ with a long message written over it.

‘Happy birthday to the queen of fabulous parties, talking in shorthand and keeping all things Hunky Dory,’ she began.

‘”The Lady” herself @kathyhilton I LOVED seeing Kathy on RHOBH. I love how Kathy is with her family (especially her sisters @kylerichards18 and @kimrichards11. And I have been a fan of both @parishilton and @nickyhilton since I was a teen,’ she began.

‘They are both beautiful, kind, successful, strong women just like their mother. I admire Kathy for her philanthropic work, her warm, kind and nurturing spirit and the inspiring example she leads by,’ she gushed.

‘Marilyn Monroe famously said “Diamonds are a girl’s best friend.” @kathyhilton is a diamond in every sense of the word. Beautiful inside, and out, priceless with an extraordinary amount of live for her family and unbreakable as she is filled with strength and grace from God.

‘The way Kathy handles everything life throws her way, makes her an incredible diamond among us all! Happy Birthday Kathy!,’ she finished.

Kathy and her friends stood in front of a picture of Mick Jagger