Bradley Cooper is supporting his "Silver Linings Playbook" costar Jennifer Lawrence after she recently blasted Hollywood's gender pay bias.

Lawrence recently addressed the issue of unfair pay for women in a candid essay on Lena Dunham’s blog Lenny, taking aim at what she called the double-standard in the treatment of women who negotiate for fair compensation in Hollywood.

"One thing I could say is that's interesting because if you think that you only deserve a certain amount and that's not correct, it's about changing that mindset and sticking up for yourself the way that Sienna [Miller] did," Cooper told E! News. "So that's a great thing."

Cooper says that his "Burnt" costar Sienna Miller recently turned down an offer to star in a play after she learned she wouldn't a salary that was "a million miles of what the male actor was being paid," Miller told Marie Clarie, adding, "women always have to do more publicity than the men."

The Oscar-nominated actor, who played opposite Lawrence in "American Hustle," reportedly negotiated a higher salary than the in-demand actress Lawrence in the hit heist flick, taking in 9% of proceeds from the film versus her 7%, according to an email leaked after a cyber attack on Sony earlier this year. In fact, leaked correspondence revealed that costars Christian Bale and Jeremy Renner all received higher salaries than Lawrence.

Lawrence expressed regret for acting demur during contract negotiations because she feared earning an unwarranted reputation of being a "brat"--something she said she believes is perpetuated by showbiz male executives who continue to pay women unfairly.

 

She wrote: “I didn’t get mad at Sony. I got mad at myself. I failed as a negotiator because I gave up early. I didn’t want to keep fighting over millions of dollars that, frankly, due to two franchises, I don’t need. (I told you it wasn’t relatable, don’t hate me).”

However, she added in the op-ed that she's moving forward more relentlessly to demand what she's worth. “I’m over trying to find the ‘adorable way to state my opinion and still be likable! F— that,” she wrote.