Get in line ASAP for one of the world's most popular burgers.

The US chain In-N-Out Burger has popped up in Darlinghurst near Darlo Country Club and Messina. The pop-up will be at Lil Darlin.

When the fast-food chain surfaced last year at Dead Ringer queues snaked around the block.

This morning, The only question on our minds is: Animal Style Burger (with extra Thousand Island spread, mustard-grilled patties and extra pickles) or Double Double "Protein Style" Burger (with two beef patties, two slices of American cheese, onions, tomatoes, and Thousand Island spread wrapped in lettuce).

Stay tuned for updates.