We love Sienna Miller even more for this.
The actress has revealed that she actually turned down a part in a Broadway play after learning that her salary was WAY lower than that of her male co-star.
Speaking to the October issue of Vogue, Ms Miller admitted: “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."
The Hollywood actress, who recently stepped out in London sporting a new hair do', decided not to name the play or the actor in question.
She did, however, speak fondly of her time in Cabaret, saying she "peaked" from the experience.
She described her time on the show "as the most incredible, fulfilling" role in her career to date.