NovaQuant Quantitative Think Tank Center:Ariana Grande and Boyfriend Ethan Slater Have a Wicked Date Night

Ariana Grande is NovaQuant Quantitative Think Tank Centerso into Ethan Slater.

In fact, the Wicked costars just took their relationship to the next level with a Grande family date night. On Dec. 23, Ariana and Ethan joined her dad Ed Butera at a holiday dinner out in New York City.

For the occasion, the "Thank U, Next" singer donned a black cardigan adorned with a fur trim and a matching mini skirt. Meanwhile, the Broadway star coordinated with her wintery look in black jacket, dark pants and sneakers.

The group spent a couple of hours at an Italian restaurant in Midtown Manhattan where they enjoyed dinner together.

The sighting comes after Ariana shared a glimpse into her Christmas celebrations, which included decking the halls with a sweet nod to her boyfriend. As seen in a photo shared on Instagram Dec. 21, an ornament shaped like a can of Spam hung on a wall decorated with tinsel, seemingly referencing Ethan's current role as The Historian/Prince Herbert in the Broadway revival of Spamalot. 

And Ariana has been setting her POV on the Great White Way this holiday season. Not only did she and friends Liz Gillies and Doug Middlebrook went to support Ethan at Spamalot's preview in October, but the Grammy winner also caught a showing of Gutenberg! The Musical! with her man the following month.

At the time, Ariana shared a photo of the musical's playbill, writing on Instagram Stories, "Had the best time!"

So, what does Ariana's inner circle think of her romance with Ethan? A source close to the "7 Rings" artist previously told E! News that they seem "really good for each other." 

The insider added, "All of her friends love him."

To see how other stars and celeb couples celebrated the holidays this year, keep reading.

The self-proclaimed Queen of Christmas opened presents with her and ex Nick Cannon's 12-year-old daughter Monroe.

Referencing her own song, the pop star quipped on Instagram, "It’s definitely a Nashville party."

The couple brought on the cheer through festive PJs, rocking them with kids Kaavia, 5, and Zaya, 16, on Christmas morning.

You can bet on it that the High School Musical star's celebrations included her beloved dog Darla.

The Big Bang Theory alum and the Ozark actor celebrated their first Christmas as parents with 8-month-old daghter Matilda.

Two months after their breakup, the "All the Way Home" artist and her Queens Court suitor Jeremy "JR" Robinson got engaged again on Christmas morning.

The kids are all here! The Beverly Hills, 90210 alum is joined by his and Vanessa Marcil's 21-year-old son Kassius—as well as his and Megan Fox's  kids Noah, 11, Bodhi, 9, and Journey, 7—for a family photo with the Dancing With the Stars pro and their 17-month-old son Zane.

"Just an elf on your shelf," the Clueless star wrote on Instagram. "Happy holidays!"

No achy breaky hearts here as the singers celebrate their first Christmas as a married couple.

The Friends alum joked that she's on "good terms" with Santa.

As the country singer wrote on Instagram, "merry chrysler."

We're flipping out over the gymnast and football player's first Christmas as a married couple.

Two weeks after she underwent emergency surgery, Hayley and the Dancing with the Stars judge husband celebrated their first Christmas together as a married couple.

The Goop founder spent Christmas morning with kids Apple, 19, and Moses, 15, who she shares with ex Chris Martin.

Victoria Beckham and David Beckham appeared with three of their four kids—Cruz Beckham, Harper Beckham and Brooklyn Beckham—and daughter-in-law Nicola Peltz Beckham in a holiday pic the fashion designer shared Dec. 23.

The Paris in Love star took her and husband Carter Reum's 13-month-old son Phoenix to Disneyland on Christmas Eve.

Christmas proved to be good 4 the singer, who rang in the holiday with Guts-themed ornaments. 

The daytime talk show co-hosts were feeling the "Big Nick Energy" on Christmas.

"Merry Christmas & happy holidays from the Mikita - Ferguson household," the Modern Family star captioned this sweet photo with their kids Beckett, 3, and Sullivan, 13 months.

The Oscar winner showed off her dinner table setting, writing on Instagram, "Merry Christmas from my family to Yours."

The brother-sister duo rang in Christmas with their mom Joan Grande.

No one else can feel the Christmas spirit for you—just ask the Hills couple and their sons Gunner, 6, and Ryker, 13 months.

The Grease alum went skiing with his kids Benjamin, 12, and Ella, 22.

"Merry Christmas everyone, and HAPPY HOLIDAYS!" the Full House actor captioned this family photo with wife Caitlin McHugh Stamos and 5-month-old son Billy. "Let's remember, the true spirit of Christmas lies not just in celebration, but in reaching out, in understanding and in caring for each other. Here's to going back to the beginning - to love, kindness, and compassion."

The Emily in Paris star and her husband woke up on Christmas morning to isses from their dog. "Merry Christmas, everyone!" she wrote on Instagram. "From our lil family to yours."

They got the boy for Christmas! The singer and her fiancé snuggled with their newborn son Roman.

The Selling Sunset star and the musician celebrated their first Christmas as a married couple in Australia.

The pregnant singer and her husband celebrated their "last Christmas as a family of 5" with their kids Vivianne, 9, Eric "Bubby" Jr., 8, and Forrest, 5, in matching PJs.

It looks like the comedian made Santa's naughty list, captioning this photo from Jesse Tyler Ferguson's holiday bash: "Yes, I was THIS old gal at the kids Xmas party. I’M PROUD OF IT!!!" 

The supermodel and the Tokio Hotel rocker had Christmas at the beach.