"HAPPY BIRTHDAY HUSBAND!" Travis Scott's birthday cake reads

Could Travis Scott be adding an official new title to his name this year?

On Thursday evening, days ahead of Scott’s April 30 birthday — when he’ll turn 28 — Kylie Jenner and 14-month-old daughter Stormi, alongside numerous members of the Kardashian and Jenner family, celebrated the rapper during a superhero-themed party.

At the evening celebration, held at Cinepolis in Westlake Village, California, Jenner gave her boyfriend a cake, which included miniature figurines of Scott, Jenner and Stormi dressed up in superhero costumes. While the party was held in Scott’s honor, the sweet message that was printed atop his birthday cake was perhaps the most telling about how deeply Jenner feels for him.

“HAPPY BIRTHDAY HUSBAND!” the cake from Jenner to Scott reads in all capital letters, which was captured on big sister Kim Kardashian West’s Instagram Story.

Although the couple is not yet engaged or married, this certainly isn’t the first time that the lovebirds have referred to each other as husband and wife. Just last weekend, Scott dubbed himself “Husband of the Goddess K” in an Instagram post.

Kim Kardashian
Credit: Kim Kardashian/Instagram

For the party, the family of three wore creative looks ahead of the Friday release of Avengers: Endgame, which marks the epic end of the seven-year Avengers saga.

Jenner, 21, dressed up as one of the Marvel Cinematic Universe’s newest and most badass superheroes — Captain Marvel, played by Brie Larson — while Scott went more old school as Robert Downey Jr.‘s Iron Man.

Little Stormi was decked out as Thor, played by Chris Hemsworth — fitting, given her name!

Kylie Jenner
Stormi Webster dressed as Thor
| Credit: Kylie Jenner/Instagram

“Happy end game everyone,” the Keeping Up with the Kardashians star captioned the sweet family snapshot, taken in front of a red luxury sports car and shared late Thursday evening.

The second pair of images shared to Jenner’s Instagram account saw the makeup mogul and her beau without their daughter, with Jenner striking a few sexy poses on the hood of the car.

In one shot, she leaned in for a smooch on her rapper boyfriend’s masked face as he wrapped his arm around her waist.

“Oh you didn’t catch iron flame and captain lip kit in the credits? sucks 4 you,” Jenner joked in the caption.

While the A-list couple is happy and in love, they aren’t ready to walk down the aisle yet — but it could come soon.

In Rolling Stone‘s cover story in December, Scott revealed that he hopes to say “I do” with Jenner in the near future. The couple have been dating since April 2017 and welcomed a daughter together, Stormi, in February 2018. Scott believes they conceived her about three weeks after they met, according to the magazine.

“It got to a point where I was like, ‘I need [Kylie] with me to operate. She’s that one,’ ” Scott told Rolling Stone in the interview, adding, “We’ll get married soon. I just gotta sturdy up — I gotta propose in a fire way.”

He recalled to the magazine that at the beginning of their relationship, neither star was sure if the romance would be serious.

“We was just two kids, f—ing around. Maybe, like, the first week, you don’t know if it’s real or a fling,” he explained. “Then the second week you’re like, ‘Whoa, I’m still talking to her, she’s responding, I’m responding. We ain’t run out of a thing to say.’ “

When the Lip Kit mogul’s pregnancy happened, Scott told Rolling Stone they had the same reaction.

“We felt like, ‘This is something special.’ And kids are something we kind of talked about when we were getting busy,” he mused.

Though the rapper was initially hoping for a son, Stormi has changed his world.

“At first I was like, ‘Man, I need a son,’ ” he told Rolling Stone. “When we found out it was a girl, I was like, ‘Huhhh.’ But after a while I was like, ‘Yo, this might be the illest thing that ever happened.’ And when Stormi was born, I was like, ‘Life is fire, bro.’”

Avengers: Endgame is in theaters now.