Joan Rivers has blasted Kim Kardashian in her new autobiography.

The 81-year-old comedienne takes aim at the 'Keeping Up with the Kardashians' star - who reportedly snubbed her at an event last month - by joking about her infamous sex tape in new book, 'Diary of a Mad Diva', and she also has harsh words for Kim's new husband Kanye West.

In extracts obtained by RadarOnline.com, Joan reportedly refers to President Barack Obama's 2013 inauguration by quipping: ''If I want to see millions of smiling black people, I'll set up a camera in the hallway outside Kim Kardashian's bedroom!''

Joan, who has her own reality show with her daughter Melissa Rivers, also claims she feels like ''one of the Kardashian girls - except I don't have a sex tape or black hair''.

The cut-throat star often takes shots at Kim, Kanye and the rest of the Kardashian clan on her E! show, 'Fashion Police', and once even branded the superstar couple's 12-month-old daughter North ''ugly''.

The insult reportedly led to Kim, 33, refusing to sit next to Joan at a presentation hosted by E! - which produces both their shows - in May.

Elsewhere in the book, Joan scolds absurd celebrity baby names, again alluding to the reality star and her rapper beau.

She wrote: ''Kanye West's new son is going to be named P*ssy in honour of where he came from.''

The couple aren't the only ones to be subjected to Joan's wrath, however, as acerbic tongued celebrity also slams ''stupid'' Jennifer Aniston, ''fat'' Lena Dunham and ''bulimic'' Tyra Banks.