A world without new Hilary Duff music is so yesterday. The Younger alum, 38, announced on Monday, November 3, that her first new single in 10 years is dropping this week. Titled "Mature," the track will be out Thursday, November 6. "So happy this is finally yours to hear," Duff wrote via Instagram alongside the single's cover art. "Been keeping this one quiet too long. My new single Mature is out Nov 6. 🍸🪩🍒." Eagle-eyed fans noticed that a countdown appeared on Duff's website this weekend, teasing an announcement to come on Monday.