The McRib is returning to McDonald's.

The sandwich has reportedly returned to some New York locations.

Hawaii and Southern California McDonald's say they'll start serving the McRib in early November.

McDonald's says there's a lot of 'mystery' surrounding the sandwich's return, as not every location brings it back every year.

McDonald's is bringing back the McRib.

The fast-food chain is bringing the controversial boneless pork sandwich back to certain locations across the US in early November, McDonald's confirmed on Thursday.

For those who don't completely know what the McRib is, McDonald's describes it as "made with 100% seasoned boneless pork, McDonald’s signature McRib sauce — a sweet, tangy, barbeque style sauce — and served with dill pickles and mild, fresh slivered onions on a toasted hoagie-style bun."

Twitter McDonalds_SoCal

McDonald's SoCal tweeted that the McRib will return on November 2, while McDonald's Hawaii tweeted that the sandwich will return on November 9.

On Tuesday, reports emerged that the McRib is already available in locations in at least eight states, including New York, Texas, and Oklahoma.

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Twitter

"There's a lot of mystery around why the McRib comes and goes, but to be honest it's a local option based on consumer demand," the main McDonald's account tweeted last week.

Part of the McRib's appeal is the chaotic customer response and copious press coverage that the sandwich receives. It doesn't return every year or to every location — which makes the hunt for the McRib even more exciting.

One fan created the McRib locator, which keeps track of sightings of the sandwich. McDonald's has also launched its own "McRib Finder app," which provides a map charting which locations are selling the sandwich this year.

This year, McDonald's also is offering McRib delivery via UberEats.