Heidi Klum and beau Tom Kaulitz dress up as Fiona and Shrek for her annual ...

She's has been a world-renowned supermodel who always goes all out when it comes to a costume for her annual Halloween party.

But in 2018, Heidi Klum may have topped herself.

The America's Got Talent judge, and beau Ton Kaulitz, went all-out green for the 19th annual bash, dressed as Princess Fiona and Shrek from the hit movie franchise. 

Amazing: Heidi Klum and beau Tom Kaulitz went as Fiona and Shrek for the supermodel's 19th annual Halloween party in NYC on Wednesday

Amazing: Heidi Klum and beau Tom Kaulitz went as Fiona and Shrek for the supermodel's 19th annual Halloween party in NYC on Wednesday

The couple weren't just dressed as the Shrek characters, they literally embodied the the characters. 

The costumes were unbelievably elaborate, like something from a movie, and took hours to be completed.

They also didn't skimp on the wardrobe: the German-born rocked a spot-on emerald green gown with all the embroidery, while Tom was picture perfect in his off-white shirt/brown vest ensemble.

Transformation: The couple proudly put their ensembles on display for all to see

Transformation: The couple proudly put their ensembles on display for all to see

Spot on: Heidi hired professional makeup artists to help with the costumes

Spot on: Heidi hired professional makeup artists to help with the costumes

The 45-year old had teased her fans about her costume for weeks. 

And then on Halloween morning, she gave a step-by-step glimpse of them undergoing their extensive transformations on Instagram.

'Ok lets to this.... #heidihalloween #heidiklumhalloween #heidihalloween2018,' she captioned a video. 

It all started with facial makeup, which led to body prosthetics that made both of them fuller. 

In her clip she said: 'Here we go!' while also giving a shout out to special effects makeup artists - Mike Marino, and Mike Fontaine, whose sister Nikki Fontaine is a makeup artist for DailyMailTV and also helped Heidi with her preparations for this year's costume.

Fans were in a frenzy trying to guess her costume, which included votes for The Mask, Ursula from The Little Mermaid and Princess Fiona from Shrek. 

Striking a green pose: Heidi was eager to show off her amazing costume

Striking a green pose: Heidi was eager to show off her amazing costume

In the dark: Heidi chronicled her transformation on her Instagram

In the dark: Heidi chronicled her transformation on her Instagram

In the dark: Heidi chronicled her transformation on her Instagram

Suspenseful: Fans tried to guess Heidi and Tom's costumes during the transformation

Suspenseful: Fans tried to guess Heidi and Tom's costumes during the transformation

Suspenseful: Fans tried to guess Heidi and Tom's costumes during the transformation

Meet the Screk: Tom and Heidi  hung with Mike Meyers, the man who voiced Schrek in the animated fantasy comedy; Meyers dressed as a member of punk icons The Ramones

Meet the Screk: Tom and Heidi  hung with Mike Meyers, the man who voiced Schrek in the animated fantasy comedy;

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