Charli D'Amelio's nickname for Landon Barker has just been revealed.

TikToker shared a series of photos of the couple to Instagram Oct. 9 and wrote, "Happy 19th landlord!" 

Landlord, er Landon, seemed to appreciate the sweet shout-out, writing "love you!" in the comments.

He also re-shared Charli's post on Instagram Stories, calling her "my [heart]." 

A source told E! News in June that Charli, 18, and Landon were in the "early stages of dating." 

But as time went on, it became clear that their relationship was getting more serious.

They've shown PDA, hung out with each other's families and friends and supported each other in their careers.

"He was very proud of me," the social media star told reporters about Landon's reaction after her performance.

"He's never seen me dance before so I think I was nervous, but he's always been so supportive."

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