Duff’s fans assumed she wrote her track about DiCaprio, 51, as she sings, “Very Leo of you with your Scorpio touch.”
Listeners speculated that the hitmaker, 38, was referring to the “Inception” star’s nickname, Leo, and his Nov. 11 birthday zodiac sign, Scorpio.
In the track, the pop star also sings about someone with a much younger woman, crooning, “She looks like she could be your daughter / Like me before I got smarter / When I was flattered to hear you say / You’re so mature for your age.”
The “Titanic” star, who is currently dating Vittoria Ceretti, 27, has been known to separate from his partners when they turn 25, or “before [their] pre-frontal cortex has fully developed.”
Additionally, Duff sings about hiding her car at Carbon Beach in Malibu, Calif., where DiCaprio owns a home.
Rumors that the actor was the man behind Duff’s song were further fueled when the Disney alum’s husband, Matthew Koma, took to social media to share a meme of DiCaprio holding the “Mature” album.
“You can’t take anything that Matthew posts seriously,” Duff added on the radio show.
“He’s the biggest troll on the planet Earth. He will lead everybody down all the roads and have the most fun doing it.”
The “So Yesterday” singer, however, refused to confirm the rumors, saying, “So, not confirming, not denying anything here.”
Duff’s new song is her first since the release of her 2015 studio album, “Breathe In. Breathe Out.”
“Making music was a huge risk that I took at such a young age, and it was a huge part of my makeup for the longest time,” she told Vogue in an interview published on Nov. 6.
“It was hard to step away from it, but I always knew I would come back whenever the timing felt right.”
Duff is set to release her forthcoming studio album “Luck…or something” on February 20, 2026.
