Tom Holland Calls Rumored Girlfriend Zendaya 'My MJ' in Sweet Birthday Tribute

The 'Spider-Man' costars were recently photographed at a wedding together after being photographed kissing in July.

Tom Holland is vying for the title of "sweetest superhero" with his recent tribute to Spider-Man costarZendaya. On Wednesday, the 25-year-old actor took to Instagram to post a tribute to the actress on her 25th birthday, sharing a cozy behind-the-scenes photo of the two taken by Zendaya herself.

"My MJ, have the happiest of birthdays," Holland wrote. "Gimme a call when your [sic] up xxx."

The photo features the rumored couple posing for a mirror selfie while on the set of a Spider-Man movie. Tom is wearing his Spidey suit with his face exposed and covered in fake cuts and bruises. The Euphoria star stands behind him with a wide smile on her face, resting her chin on his shoulder and taking the photo with a silver camera.

The birthday girl responded to the sweet post, commenting that she was, "Calling now ♥️."

Speculation of a romance between the two began when they were photographed kissing while taking a drive in Los Angeles and later spent the Fourth of July weekend together. Then, the Spider-Man: Far From Home stars were photographed together at a wedding last weekend. Their friend, Esteban Camarillo, posted a picture on his Instagram Stories showing Zendaya with her head on Tom's shoulder as he holds on to the sleeve of her floor-length brown dress. The two were smiling and appeared to be in good spirits in the group photo.

The two actors have yet to confirm if they're in a relationship, but romantic rumors about the two have been circulating on-and-off since their first Spider-Man press tour back in July 2017.

ET spoke with Zendaya last month, and she talked about being so close to her Spider-Man: No Way Home co-stars. The highly anticipated film hits theaters on Dec. 17.

"I can't wait for everybody to see Spider-Man when it does come out," Zendaya said. "And you know, we all work so hard and we're all so close from that. I'm excited! We're gonna have a good press tour I think."

Zendaya celebrated her birthday while filming her HBO series Euphoria, which is currently shooting season two. The star posted a behind-the-scenes photo of the set to her Instagram Stories just before she turned 25, writing, "No place I'd rather spend my bday..."

Instagram Stories @Zendaya

When it comes to the upcoming season, Zendaya told ET that the installment is a "tough" one.

"Rue means so much to me, but she means so much to a lot of people I think. I'm grateful to have been able to bring her story and I think a lot of people's story through her to life," she shared. "It's brutal, but a character like that I think really deserves that time and deserves those moments. I'm in the middle of it right now. Like, I had a night shoot 'til 2:30 last night."

Season 2 of Euphoria is expected to premiere on HBO next year.

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