Renée Zellweger's boyfriend, Ant Anstead, asks her to 'please leave the wardrobe at work' ahead of 'The Thing About Pam' premiere

• Ant Anstead asked Renée Zellweger to "please leave the wardrobe" for her show at work.

• Zellweger wears a bodysuit and prosthetics as the murderer Pam Hupp in "The Thing About Pam."

• "The idea is to be accurate," Zellweger previously told "Entertainment Tonight."

The TV host Ant Anstead asked his "smoke show" girlfriend, Renée Zellweger, to "please leave the wardrobe at work" in an Instagram caption, which has since been edited, referring to the fat suit she wore to play the convicted killer Pam Hupp in the upcoming NBC drama "The Thing About Pam."

The fictionalized crime show based on true events will tell the story of Betsy Faria's (played by Katy Mixon) murder and how her friend Hupp almost tricked a small town into believing Faria's husband, Russ Faria (played by Glenn Fleshler), committed the crime. When they eventually dig into Hupp's background, authorities find she has plenty of secrets.

Zellweger previously told "Entertainment Tonight" that she wore the controversial bodysuit and prosthetics and spent hours in the makeup chair transforming into Hupp because "the idea is to be accurate."

"Especially in the case of telling this story, it was really important to as closely resemble Pam Hupp as we possibly could because she seems so familiar," the "Bridget Jones's Diary" star said.

She said people "projected" who they thought Hupp was onto her, a key piece of telling the story. Zellweger said she felt her physical transformation was required to make the story feel true.

Zellweger told "ET" she was "amazed" the first time she saw herself in her full costume.

She said that when it came to resembling a real person on a show like "The Thing About Pam," one would usually expect the costume to get "a couple of things" right but she had "no expectation" that it would be "as remarkable" as it was.

The "Judy" star said her time in character on set in New Orleans was "hot" but that it was "amazing to watch" the prosthetics designer do his work. She added that the designer had focused on nailing precise details "right down to the last little freckle."

"The Thing About Pam" premieres Tuesday at 10 p.m. ET on NBC.

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