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It was a superhero night in Miami Wednesday when Kardashians and their significant others arrived at a Halloween party dressed to impress as America's favorite caped crusaders.

Kim K. came as Catwoman while current lover Kanye West was Batman at the party Kim organized at a nightclub at the Fontainbleau in Miami Beach. Kanye's costume included a full face mask, not the usual Batman protocol.

Plus, no Batmobile for this couple - they arrived in a gold Lamborghini, as Kim tweeted "Can't wait for u to see my costume!"

Sister Kourtney came as Batgirl, looking remarkable svelte in a skintight costume only four months since the birth of her second child. Her boyfriend Scott Disick, father of her kids, came as Robin.

The two couples had gone on a double date earlier in the day, lunching at a restaurant in Miami.

Naturally the party had a promotional component: Kim and Kourtney are in Miami to film their upcoming reality spinoff Kourtney & Kim Take Miami, set to air in early 2013.