Kristen Stewart has claimed women have to work harder in Hollywood because the industry is “disgustingly sexist”.

The Twilight star plays a personal assistant to a big Hollywood star in new movie The Clouds Of Sils Maria, opposite Juliette Binoche.

Kristen, 25, told Harper’s Bazaar UK: “Women inevitably have to work a little bit harder to be heard. Hollywood is disgustingly sexist. It’s crazy. It’s so offensive it’s crazy.”

The former child star – whose love life has been under a magnifying glass ever since she dated her Twilight co-star Robert Pattinson, and then cheated on him with Snow White And The Huntsman directer Rupert Sanders – also admitted she didn’t enjoy fame.

Kristen told the magazine: “Fame is the worst thing in the world. Especially if it’s pointless. When people say, ‘I want to be famous’ Why? You don’t do anything.”

The tomboy star also opened up about her weight.

“I’m a little bigger than sample size when I’m eating cheeseburgers and am happy and comfortable,” revealed Kristen.

“If I’m stressed or working, the weight falls off. My weight and my sleep are tied to my nervous system. Sometimes I’ll sleep for 12 hours a night and sometimes sleep just doesn’t exist for me for a couple of months.”

And the Still Alice star also talked about sex scenes, insisting she didn’t have a problem with them, but confessing she had felt a lot of pressure when Bella and Edward finally made love in the Twilight saga.

Kristen said of sex scenes: “I only hate them when they’re contrived. That’s when it’s grotesquely uncomfortable. On Twilight we had to do the most epic sex scene of all time. It had to be transcendent and otherworldly, inhuman, better sex than you can possibly ever imagine, and we were like, ‘How do we live up to that?’ It was agony. Which sucks, because I wanted it to be so good.”