Lindsay Lohan slams Hollywood rivals

Lindsay Lohan has branded Sienna Miller a "no talent crackhead" during a verbal attack on her Hollywood rivals.

Scarlett Johansson, Keira Knightley and Jessica Simpson also got a tongue-lashing from the star when she was overheard ranting to friends at a party.

A source told US magazine National Enquirer that Lohan described Johansson as "ugly" and accused Simpson of being "dumb".

After claiming that she was "the greatest actress in the world," the Mean Girls star then turned her attention to Knightley, calling her a "flat, shallow, cardboard cut-out of an actress".