Supermodel Heidi Klum is busy preparing her Halloween costume and has shared a sneak peak with her fans on social media on the preparation taking place for the costume.

The 42-year-old took to Instagram to share the making of her costume for her "favorite holiday," reports aceshowbiz.com.

One of the images showed her body covered in white plaster. Klum stood still alongside a designer team from Prosthetic Renaissance, an artistic powerhouse of design and make-up FX.

"It's almost time for my favorite holiday! Costume prep time with the team at @prorenfx Can't wait for Halloween!" read the caption.

Another photograph showed her face and body smeared with blue plaster.

Klum looked straight at the camera while the team was busy putting the liquid on her face and body.

The caption for the image read: "So yucky but so worth it in the end #heidihalloween #heidiklumhalloween."

The "America's Got Talent" judge also shared two videos showing the process of creating her Halloween costume.

One of the videos showed her face fully covered with blue plaster. Some of the team members also used hair dryers to make the plaster dry quickly.

She captioned the video: "Thanks @prorenfx team for making my crazy costume idea a reality."