Miguel put a ring on it — a massive one at that!

The singer is reportedly engaged to longtime girlfriend, Nazanin Mandi, who showed off her humongous ring on Instagram Monday — but didn't confirm she's getting hitched to the star.

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The couple, who've been together since Miguel was 18, is said to be thrilled about their upcoming nuptials.

"Nazanin and Miguel are really excited to get married! They've been together for some time and knew that they were going to spend their lives together," a source tells E! News. "All of their friends and family think they are the best couple and really complement each other."

Although details surrounding the 30-year-old's proposal have yet to be revealed, the source says it was "very heartfelt and real" and "done perfectly."

So, is the Grammy winner planning any special performances for the big day? "Miguel will definitely be singing his soon-to-be wife a tune when their wedding takes place," the insider adds.

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Congrats to the happy couple!