Leni Klum Reveals Her Costume at Heidi Klum's Halloween Party 2025

For last year's event, Leni channeled her mom's theme with her out-of-this-world alien costume, complete with a metallic bodysuit and skin-colored antennas. Meanwhile, the America's Got Talent judge and Tom were ready to phone home as the male and female versions of E.T. from the titular 1982 film.

As for how Heidi—who also shares kids Henry, 19, Johan, 18, and Lou, 16, with ex-husband Seal—brought the nostalgic characters to life?

"It took one year to get ready," she explained to E! at the time. "We started at 10 a.m. this morning. We just got ready, we just came down."

While she loved bringing the wrinkly alien to life, it wasn't easy being in the suit.

"It was so heavy holding that head on my head because it goes from the back to the front," she explained on The Tonight Show Starring Jimmy Fallon in August. "I thought my neck was going to snap off." 

But Heidi, 52, has no regrets about the work it takes for her costumes. After all, her love for Halloween goes back decades.

"When I moved to America, I immediately fell in love with Halloween and the spookiness of it," she told The Hollywood Reporter in 2018. "All that was missing was a fantastic party. It felt like a real opportunity for me. 

And she hopes that her elaborate looks as the host will inspire her guests to follow suit.

"It's worked because, over the years, people have become increasingly more outrageous with their costumes," she added. "The party has become almost legendary. It's epic. I feel like my love for Halloween has made other people fall in love with the holiday, too." 

Now, keep reading to see all the celebs partying at Heidiween 2025.