Former “Good Morning America” cohosts T.J. Holmes and Amy Robach are radiating newly engaged bliss … and that glow is definitely bouncing off the massive sparkler now parked on her finger!

Check out the pics — the pair were hand-in-hand in NYC Wednesday, with Amy flashing a mega-watt smile and that blindingly bright humongous ice on her finger, which was basically the only thing not low-key about their outfits.

The lovebirds made a pit stop at a mailbox to drop off some letters … which totally could be wedding invites, if they’re really out here speed-running their planning phase.

The duo revealed their engagement on their “Amy & TJ” podcast last month … after what’s been one whirlwind — and wildly controversial — love story.

They were first snapped together looking cozy back in November 2022 — while they were both still married. They’ve always denied having an affair, saying they were already separated at the time … but ‘GMA’ still showed them the door after an internal investigation.