Paris Hilton and her younger sister Nicky Hilton enjoyed a day of family fun at the Museum of Ice Cream in New York City on Tuesday.

The blonde sisters — Paris, 43, and Nicky, 41 — were joined by their children as they hosted the third annual Young Hearts Friend Fest.

Nicky is mom to daughters Lily-Grace, eight, Teddy, seven, and son Chasen, four. She shares them with longtime husband James Rothschild.

Paris welcomed son Phoenix, two, and daughter London, one, with husband Carter Reum.

Kathy Hilton was also at the charity event, which benefits God’s Love We Deliver. 

Nicky is mom to daughters Lily-Grace, eight (far right), Teddy, seven (L), and son Chasen, four, (not pictured). Paris is mom to Phoenix, two (seen sitting on her lap), and London, one (pictured second from right)

Paris Hilton and her younger sister Nicky Hilton enjoyed a day of family fun at the Museum of Ice Cream in New York City on Tuesday

The blonde sisters – Paris, 43, and Nicky, 41 – were joined by their children as they hosted the third annual Young Hearts Friend Fest

Paris, Nicky, and Kathy were aligned in their dress code, with each of the stylish women donning pastel-colored outfits.

For her part, Paris arrived in a lacy pink frock with a crew neck; she added a fitted cardigan and accessorized with a pink hair bow.

Read More Paris Hilton reunites foster pup displaced by LA fires with its original family

And the heiress rounded out the modest ensemble with a pair of sparkly gold pumps with bow accents.

Nicky, meanwhile, showed up in figure-hugging pale blue dress with a sweetheart neckline that teased her cleavage.

And like her older sibling, she opted for heels as she chose a Cinderella blue satin variety.

Both women wore their blonde locks loose, with Paris rocking a part down the middle while Nicky chose a side part.

They looked typically beautiful in full faces of soft makeup with touches of pink on their cheeks and pouts.

Kathy, who is a mother-of-four, arrived wearing a long, pink, tweed blazer and black trousers. 

Paris’ son wore a baby blue Moschino sweatsuit while Nicky’s daughter Lily-Grace wore a Self-Portrait blue dress

Paris welcomed Phoenix and London with husband Carter Reum

Earlier this month Paris and Nicky promoted the event via their Instagram accounts, sharing a joint post with God’s Love We Deliver.

The caption read, ‘The Hilton sisters are teaming up for a great cause. Nicky and Paris Hilton are hosting the third annual Young Hearts Friend Fest at the @MuseumOfIcecream on January 28.’

The note to their nearly 30 million combined followers continued, ‘Benefiting @GodsLoveNYC, this special event celebrates volunteerism and encourages children and families to get involved in and give back to their communities.’

The sisters invited people to ‘enjoy a magical evening swimming in a sprinkle pool, cotton candy art, music, face painting, cupcake decorating, and, of course, lots of ice cream.’ 

Nicky commented on the post, ‘CAN NOT WAIT!’ 

The family smiled in a group pH๏τo at one of the museum’s activations

The sisters enjoyed quality time with the little ones in a pink and red sprinkle pit at the museum

Hilton looked effortlessly chic in a pink lace frock while holding her son on her hip

Paris has been flexing her philanthropist muscle a lot lately. 

Days ago she returned a dog to its original owners after housing it amid the Los Angeles wildfires.

She took to Instagram on Monday to share the moment a small brown chihuahua mix named Zuzu was reunited with a mom and son.

Zuzu’s original family was displaced following the devastating fires that swept through the city earlier this month.

Posting a video, Hilton shared the sentimental moment the family members arrived at her door to retrieve the canine, adding an emotional caption.

‘Letting go is never easy, but moments like this remind me why fostering is so important ❤️,’ she wrote to her nearly 27 million followers.

Also this month, after losing her Malibu home in the blaze, Hilton launched an emergency fund, starting with a $100,000 donation to other victims.

Along with her generous contribution, she revealed that she will match ‘additional dollars raised up to $100,000 more.’