Hilary Duff’s husband, Matthew Koma, has his own theory about her new song. The actress and singer released “Mature,” her first single in a decade, in late 2023. Speculation immediately swirled about its subject, with many fans pointing to her ex-boyfriend Joel Madden or actor Leonardo DiCaprio.

The couple addressed the rumors directly in a joint interview on December 4. During the conversation, Koma offered a humorous alternative for the song’s inspiration. He suggested it might be about a much older political figure.
Bernie Sanders Gets a Surprise Mention in Song Theory
Matthew Koma proposed that “Mature” could be about Bernie Sanders. The musician quipped that he felt “less threatened” by the 84-year-old senator than by other suggested muses. He made the joke during an Apple Music 1 interview with his wife.
Hilary Duff playfully countered his suggestion. She said it would be “too obvious” to sing about Sanders or other older celebrities. She listed Dick Van Dyke, Patrick Stewart, Morgan Freeman, and Danny DeVito as examples. According to E! News, Matthew replied that he liked these suggestions more than the Leonardo DiCaprio theory.
The song’s lyrics have fueled intense online debate. A key line states, “She looks like she could be your daughter / Like me before I got smarter.” Another references the troubling compliment, “You’re so mature for your age.” These phrases led many to believe the track critiques an age-gap relationship.
Nicole Richie Weighs In as Speculation Continues
Public interest has focused on Duff’s past relationship with Joel Madden. They dated in the early 2000s when there was a significant age difference. This history made him a prime candidate for the song’s subject in the eyes of many listeners.
However, Joel Madden’s wife, Nicole Richie, shared her thoughts. Richie is a close friend of Hilary Duff. She posted about the song on her Instagram Story in November. Richie captioned a photo of them laughing, “‘Mature’ is not the word I would use to describe us, but regardless, this song is a BOP.”
The couple’s interview provided a lighthearted look at their dynamic. It also shifted focus from pure speculation to the song’s broader message. The track is widely seen as a critique of men who pursue much younger women.
The discussion around “Mature” highlights its relatable themes. Hilary Duff’s return to music has successfully sparked conversation. The song’s true inspiration remains a playful mystery between the artist and her husband.
A quick knowledge drop for you
What is Hilary Duff’s new song “Mature” about?
The song critiques older men who pursue much younger women. While fans speculate about ex-boyfriend Joel Madden or Leonardo DiCaprio, Duff and her husband joked about other inspirations. The lyrics address the problematic “you’re so mature for your age” compliment.
Who is Matthew Koma?
Matthew Koma is a musician and Hilary Duff’s husband. They married in December 2019 after several years of dating. The couple has two daughters together, Banks and Mae.
Did Nicole Richie comment on the song?
Yes, Nicole Richie, who is married to Duff’s ex Joel Madden, posted about the song. She is a close friend of Duff’s and called the track a “BOP” on her Instagram Story. She humorously noted that “mature” isn’t the word she’d use to describe their friendship.
Is “Mature” Hilary Duff’s first new music?
“Mature” is Duff’s first solo single release in over ten years. She has focused on acting and family life in recent years. The song marks a significant comeback to her music career.
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