Tarek and Heather Rae El Moussa had dinner at one of Disney's private residences that costs $15,000 to reserve

• Heather Rae and Tarek El Moussa attended a dinner at Disneyland's 21 Royal.
• The private residence offers a one-of-a-kind dining experience that costs $15,000 for 12 people.

Tarek and Heather Rae El Moussa dined at one of Disney's most expensive properties.

The El Moussas recently attended their friend Kristen Steinberg's birthday dinner at 21 Royal, a private property that sits inside Disneyland, as Heather shared on Instagram.

"Felt like real life princesses," Heather, who is expecting her first child with Tarek, captioned a shot of herself with friends at the Disney property.

"Celebrated one of my besties @themrskristen's birthdays at Disney's 21 Royal last week on a day where I shared that I wasn't feeling my best… Crazy how being around the people you love can completely change your whole mood," she went on to write.

"But back to us feeling like princesses : going to Disney with all your friends and getting all dressed up is so fun and felt so nostalgic," she added. "I was just channeling my inner Cinderella all night long."

Heather's post included multiple photos of herself at 21 Royal, including a shot with Tarek on what looked like a balcony.

According to the 21 Royal website, the private residence, which sits on Royal Street in the New Orleans Square of Disneyland, was "once envisioned by Walt and Lillian Disney as a secluded family retreat and a luxurious oasis in which to host celebrities and dignitaries," but it is now a destination for private, pricey dinner experiences for Disney fans.

The dining experience includes signature cocktails served by butlers, a reception on the property's patio, a seven-course dinner specifically designed for each party, and dessert on a balcony overlooking the park's Rivers of America, as the property's website states.

A 21 Royal experience costs $15,000 for twelve people, according to Eater's Carlye Wisel.

The price tag sounds hefty, but Wisel reported that in addition to the dining experience, a reservation at 21 Royal also gives guests park-hopper tickets and valet parking at the Grand Californian Hotel.

Part of 21 Royal's appeal is also its aesthetic, as its decor is inspired by 19th-century New Orleans.