Kelly Osbourne has quit as a co-host of E! show Fashion Police, days after threatening to leave over the fall-out following ill-advised remarks her colleague Giuliana Rancic made about her friend Zendaya Coleman's red carpet look at the Oscars.

The teenage actress took offense to Rancic's comments about her dreadlocked look, prompting the TV presenter to offer her a heartfelt apology.

Osbourne, who was seated next to Rancic when she suggested Coleman looked like she "smelled of weed", was dragged into the drama by fans, who took to social media to criticize Kelly for not objecting at the time.

She reminded her Twitter followers that she hadn't made the comments, stating, "I WILL NOT BE DRAGED (sic) INTO THIS! The situation is being rectified like ADULTS by both parties. I hope you can leave it to them & do the same!"

She added, "I'm giving everyone involved 24 hours to make it right or the world will hear how I really feel. contactually (sic) Im not allowed to speak!"

Confirming the news of her departure on Friday (27Feb15), an E! spokesman said, "Kelly Osbourne is departing E!s Fashion Police to pursue other opportunities. We would like to thank her for her many contributions to the series over the past five years, during which time the show became a hit with viewers."

Osbourne will not feature on the show when it returns to TV at the end of March (15). It is not known who will replace her.

Shortly after news of her departure broke, Osbourne's mother Sharon tweeted her support to her daughter, writing, "@KellyOsbourne, I am so proud of you. You can never be bought. You always wear your heart on your sleeve. #ProudToBeYourMum."