Zachary Quinto is planning on popping the question to his boyfriend, Jonathan Groff, Star magazine is exclusively reporting.

The 35-year-old Star Trek actor, who recently moved in with the Glee actor, is said to be absolutely smitten with Groff.

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“It’s by far the happiest relationship he’s ever been in,” a source close to the couple told Star.

“They’ve been serious for a while now, but things have heated up since they started living together.”

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To read more about when, and how, Zachary is planning to propose to Jonathan, pick up the latest issue of Star magazine — on newsstands Thursday.