And it spans all over the world, including in Vermont Village in Saint Vincent. The 32-year-old royal stopped by the area Saturday during his two-week-long Caribbean tour and came face-to-face with one of his admirers, 54-year-old Avis Collis, while greeting a crowd.
"Love you!" she said, smiling and holding his hand, to which he responded, "Love you!"
A video of the sweet exchange was posted by the U.K. newspaper The Mirror, which also reported Collis asked one of the outlet's reporters to give her phone number to Harry.
Kensington Palace had confirmed Harry's relationship with Markle in a statement on Nov. 8 while condemning those who have abused and harassed the actress on social media.
His brother Prince William meanwhile set the record straight over a recent rumor that said he was unhappy with Harry's decision to go public about dating Markle.
"The Duke of Cambridge absolutely understands the situation concerning privacy and supports the need for Prince Harry to support those closest to him," Kensington Palace said in a statement to E! News.
The Telegraph also quoted a source as saying, "They don't issue statements like that without talking to each other, and they talked about the Meghan Markle statement extensively in advance of it being put out."
"The Duke was as alarmed as anyone about what was happening with Meghan," the source added. "No-one wanted to have to put that statement out, including Prince Harry, and there was concern about confirming the relationship. But over the course of one weekend things escalated to the extent that Prince Harry felt he had to act."
Markle has not commented on her relationship with Harry.
She recently returned from Canada, where she finished filming season six of her show Suits, and celebrated Thanksgiving with her parents.
"There's no place like home," the Los Angeles actress wrote on Instagram Sunday, alongside a photo of palm trees.