GIULIANARANCIC VIA INSTAGRAM

Guiliana Rancic posted a screen grab of her hosting E! News nude on a dare from Joan Rivers.

Giuliana Rancic is a woman of her word.

Which is why, when comedienne Joan Rivers dared the 38-year-old E! News host to appear naked on camera, Rancic didn’t back down from the challenge.

On Thursday, Rancic gave the final segment of the show wearing nothing but her birthday suit — though the network thoughtfully clothed her with some black “censored” boxes to keep the outfit PG.

E!/TIMOTHY WHITE/E!

Rancic accepted the dare from Rivers to celebrate the comedienne’s 80th birthday.

Though Rancic was nude, her co-host Jason Kennedy appeared with her on-set fully clothed in the segment.

The risqué behavior was all at the behest of funnywoman Rivers, who celebrated her 80th birthday earlier this month.

“At 80 years old, I think I need a guide dog,” Rivers tweeted. “My vision is fine, I just need someone to blame my farts on.”