Billy Ray Cyrus is head over heels for Elizabeth Hurley, with the country star praising his famous girlfriend in a sweet comment and revealing which classic ballad is their special couple’s song.

On Tuesday (July 1), the actress shared an Instagram photo of herself lounging on a boat in an animal-print swimsuit, smiling as she poses underneath a rainbow stretching across the sky behind her. “Somewhere over the rainbow, skies are blue,” she wrote in her caption, quoting The Wizard of Oz‘s “Somewhere Over the Rainbow.” “And the dreams that you dare to dream really do come true.”

In the comments, Cyrus — whom Hurley tagged in the photo — fawned over his partner. “Thank you for sharing our song in such a sweet… beautiful… and truly wholesome way!!!!” he wrote. “You are one of a kind young lady!!!”

The musician added that Hurley is “truly an original.”

Cyrus and the model have been dating for a few months now, going public with their romance in April after reconnecting over text amid the Hannah Montana actor’s divorce from singer-songwriter Firerose. In May, Hurley told Entertainment Tonight, “Billy’s a very, very fabulous person.”

“He’s a very gentle man, very nice,” she added at the time. “We’re very happy.”

The couple’s sweet Instagram interaction comes shortly after Billy Ray attended daughter Miley’s Something Beautiful premiere with Hurley at his side. Afterward, the swimwear designer shared a video of herself and her boyfriend packing on the PDA at the event, as well as a photo of the “Flowers” singer and Hurley’s son, Damian, watching the Something Beautiful film together.

“The babies are all grown up,” Hurley captioned the latter post on Instagram, adding the hashtag “#proudparents.”

“What a night to remember,” Billy Ray replied at the time. “This is what rock n’ roll is all about… the kids are together. SO PROUD xxx.”