They’ve been an item for years, but only recently went public with their relationship.

And Tom Holland made things Instagram official as he wished Zendaya a happy birthday on Wednesday morning.

The 25-year-old actor shared a snap to his grid from their Spider-Man days where she caught a photo in the mirror while hanging out in a dressing room.

Sweethearts: Tom Holland made things Instagram official as he wished Zendaya a happy birthday on Wednesday morning

Tom was dressed in full Spider-Man threads — aside from his mask — as he peered into the mirror while Zendaya snapped a photo of the couple.

‘My MJ, have the happiest of birthdays,’ he captioned the sweet snap. ‘Gimme a call when your up xxx.’ 

Zendaya admitted she was hard at work on her big day as she shared an eerie nighttime photo from the set of Euphoria.

Just the two of us: The 25-year-old actor shared a snap to his grid from their Spider-Man days where she caught a photo in the mirror while hanging out in a dressing room

Love: Hours later, Zendaya proved to be awake and ready to chat

Production: Zendaya admitted she was hard at work on her big day as she shared an eerie nighttime photo from the set of Euphoria

The couple was most recently spotted together over the weekend at a friend’s wedding in Simi Valley. 

Tom first found fame as Spidey when he was just 15 years old in the Marvel Cinematic Universe’s Captain America: Civil War, and has since starred in five MCU flicks. 

His character, Peter Parker, is classmates with Michelle Jones, aka MJ, at the Midtown School of Science and Technology.

After co-starring together in Spider-Man: Homecoming, the duo also acted in its sequel, Far From Home, and this December, will be seen in the next installment which is subtitled No Way Home. 

The cast of ‘Spider-Man 3’ reveal the title in fun new teaser

Love is in the air! Zendaya found the perfect wedding date in Tom Holland as they celebrated a friend’s nuptials together in Simi Valley on Sunday

Star power: Tom first found fame as Spidey when he was just 15 years old in the Marvel Cinematic Universe’s Captain America: Civil War, and has since starred in five MCU flicks; seen in 2017

An insider told PEOPLE last month that the pair have been romantically involved for years, but were attempting to keep their relationship private.

‘They started seeing each other while they were filming Spider-Man. They’ve been super careful to keep it private and out of the public eye but they’ve gone on vacations with each other and try and spend as much time as possible with one another,’ a source said.

Tom was linked to a woman named Olivia Bolton in 2019, but The Sun reported last April that they had called time on their relationship after nine months.

There were also reports that Zendaya and her Euphoria co-star Jacob Elordi became a couple in 2019, but he is now in a relationship with Cindy Crawford’s daughter Kaia Gerber. 

Zendaya and Tom seen together at Spiderman: Homecoming premiere in 2017

When it all began: After co-starring together in Spider-Man: Homecoming, the duo also acted in its sequel, Far From Home, and this December, will be seen in the next installment which is subtitled No Way Home; seen in 2016