The gender pay gap strikes again.

Sienna Miller, 33, has revealed that she refused a Broadway role when she discovered she was offered only half the salary of her male co-star.

In her interview with the October issue of Vogue, the actor said:

“It was a play with just two of us on stage and I was offered less than half of what he was going to be paid. If it was two men, it wouldn’t probably happen. Sad, but I walked away.”

Miller has not revealed the name of the play or the name of the male actor, for the play which would have followed Sienna’s portrayal of Sally Bowles in Cabaret in New York.

Speaking of her Broadway experience in Cabaret, Miller says:

“It was the most incredible, fulfilling thing I have ever done.”

"The first night was a euphoria you've never experienced, an adrenaline rush that is totally addictive," she says.

The issue of gender inequality among actors has been a hot topic of late, as many have come out to whistle blow the sexism they encounter on a regular basis in the industry. There are countless examples of female actors experiencing discrimination on the basis of their gender, in their jobs.

Earlier this year, Rose McGowan exposed that she was asked to wear a “tank that shows off cleavage” for an audition. As a result of this, her agent dropped her. 

Just last week, Anne Hathaway revealed she was losing roles to 24-year-olds.

In August, Jennifer Lawrence was revealed as the highest paid female actor in Hollywood, and yet continues to earn £18 million less than her male equivalents.

In May, Maggie Gyllenhaal, 37, was told she was 'too old' to play the love interest of a 55-year-old man. 

In April this year, the Sony hacking scandal revealed that American Hustle stars Amy Adams and Jennifer Lawrence were paid far less than their male co-stars, despite playing key roles - with Amy Adams appearing in almost every scene.

It seems that the women of Hollywood are no longer content to sit back and endure such blatant inequality, and are speaking up more and more. It is rare, however, for an actor to turn down a role on this basis, so Miller's stance might lead to real change. 

Patricia Arquette’s impassioned appeal for equality in the industry in her Oscar acceptance speech for her role in Richard Linklater's Boyhood remains at the heart of female actors in Hollywood:

“We have fought for everybody else’s equal rights, it’s our time to have wage equality once and for all and equal rights for women…”

If you feel passionate about the gender pay gap, we will be discussing this and many more feminist issues at Stylist Live, our four-day festival of talks and workshops. "Talk Feminism with Gemma Cairney and Friends" will be held at 10.30am on Saturday 17th October and at 12.15 on the same day, No More Page 3's Lucy-Anne Holmes and journalist Caroline Criado-Perez will be discussing online feminist activism. Get your tickets to both talks here. 

Stylist Live is a four-day festival of cocktails, culture, catwalks and conversation hosted by Edith Bowman and Dawn O’Porter on Thursday 15 – Sunday 18 October 2015.