Heidi Klum Teases This Year's Halloween Costume: 'It's Going to Be a German Theme'

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Heidi Klum's big Halloween reveal is almost here!

ET caught up with the 43-year-old supermodel at the amfAR Inspiration Gala in Los Angeles on Thursday, where she shared a little hint about this year's costume.

RELATED: Heidi Klum Has Her First Fitting For This Year’s Halloween Costume -- See the Pic!

"It's going to be a German theme," she teased. "It's going to be made in Germany."

Klum first gave fans a little glimpse at her ensemble during her first fitting earlier this month.

"First fitting for Halloween ..... Hmmmmmm...?..... what am I going to be this year ?" she wrote alongside a mirror selfie of her pantsless ensemble. "Can you guess !?!?!?!?!?!"

PICS: All of Heidi Klum's Halloween Bash Costumes

Whatever Klum shows up as on Monday, it's sure to wow.

The supermodel first hosted her famous Halloween party in 2000, where she showed up as… we're not really sure. Klum got into the spooky spirit in a black latex dress, a spiked choker and China doll makeup.

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WATCH: The Sexiest Celeb Halloween Costumes of All Time

Six years later, the Project Runway host showed off her creativity as she dressed as forbidden fruit -- her then-husband, Seal, stood by her side as Eve. While Klum's costume was wacky to say the least, it also conveniently concealed her pregnant belly (the model's third child, Johan, was born just a few weeks later).

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And in 2015, Klum was completely unrecognizable as "the ultimate male fantasy": Jessica Rabbit.

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WATCH: Heidi Klum Goes All Out In Vampy Jessica Rabbit Costume at Epic Halloween Party

ET was with Klum as she got fitted for her costume before her big Halloween bash last year. And while she definitely brought the sex appeal, creating her costume wasn't so sexy.

"I basically had to be casted head to toe because there will be lots of body parts," Klum explained. "The cast process took about four hours to do."

Additional reporting by Brendon Geoffrion.

See more on Klum's vampy Jessica Rabbit costume in the video, and check out all her Halloween looks in the gallery below.

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