Supernatural executive producer Eric Kripke was “quite frankly shocked that Paris agreed to do it”.

“If anyone ever wanted to see a bloodthirsty Paris attack and kill somebody, this is your chance,” he said in a statement.

Excited writer Sera Gamble said the role was penned “just for her”, adding that the fact she agreed to the shoot (sometime before the show’s new US season premiere in September) “speaks volumes about her sense of humour”.

“We go pretty funny and irreverent with this stuff, so expect that. She’s flat-out awesome for playing along.”

Paris, who is more airhead than heirhead since she was cut out of her hotel-chain owner grandfather’s will, was the first to let slip the news via Twitter.

“Love the show Supernatural. It rocks! So excited! :)” she tweeted.

At least Paris won’t be accused of “failing to adequately promote” the vehicle, a rap which has her defending a $US8.3 million lawsuit brought by producers of 2006 flop Pledge This!.