Kelly Osbourne has threatened to quit 'Fashion Police'.

Kelly Osbourne

Kelly Osbourne

The 30-year-old star says she is "seriously questioning staying on the show" after her co-host Giuliana Rancic made an offensive remark about her friend Zendaya Coleman's dreadlocks at the Oscars.

After receiving a lot of negative comments on Twitter, she wrote: "I WILL NOT BE DRAGED INTO THIS! The situation is being rectified like ADULTS by both parties. I hope you can leave it to them & do the same!

"you guys do realize that @Zendaya is my friend right?

"Im giving everyone involved 24 hours to make it right or the world will hear how I really feel. contactually Im not allowed to speak!

"I DID NOT MAKE THE WEED COMENT. I DO NOT CONDONE RACISM SO AS A RSULT OF THIS IM SEREIOULSY QUESTIONONIG STAYING ON THE SHOW! (Sic)"

Zendaya previously slammed Giuliana for saying "I feel like she smells like patchouli oil ... or maybe weed" while critiquing her red carpet look at the Oscars on the E! series.

She wrote on Instagram: "To say that an 18-year-old young woman with locs (dreadlocks) must smell of patchouli oil or 'weed' is not only a large stereotype but outrageously offensive."

The 40-year-old star initially apologised on Twitter but following Kelly's tweets she also issued a public apology to the young actress on E! News on Tuesday (24.02.15), saying: "Something I said last night did cross the line. I didn't intend to hurt anybody, but I've learned it's not my intent that matters, it's the result."