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Zayn Malik just revealed the big announcement he'd been teasing ... and it's a limited residency in Sin City.

The former One Direction heartthrob announced Monday he's got seven shows scheduled in Las Vegas this upcoming January ... and he'll be performing at Dolby Live at Park MGM. inzayn.com

Zayn had a countdown going on Las Vegas billboards over the weekend and had been teasing fans about a "big announcement coming up."

His Vegas shows kick off Jan. 20 and end Jan. 31. Getty

Zayn toured earlier this year after postponing shows in 2024 following the death of his late 1D bandmate, Liam Payne ... but he had nothing on the calendar performance-wise until now. Gallery Launch Gallery Getty

Zayn's recently been spotted with his One Direction buddy Louis Tom

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