8 best celebrity Halloween costumes of 2017

And they all dressed up as each other!

— -- Halloween hasn't arrived just yet, but our favorite celebrities are already getting in on the scary fun!

"Halloween is getting closer and closer ......," she wrote in a caption.

"It takes a lot of time," Klum, 44, added about pulling together her costume. "I think people don't realize what it takes to build these prosthetics. We have a really fun team of guys that are helping me every year to basically make my crazy ideas into reality."

In previous years, she's gone as an elderly woman, Jessica Rabbit, a Hindu goddess and a butterfly.