It was reported that the female actors were payed much less for American Hustle. They made seven per cent on the film's profits each, while Bradley Cooper, Jeremy Renner and Christian Bale earned nine - as did director David O'Russell.
Hilary Swank also said that women in Hollywood earned "10 times" less than men. She said in November 2014, that "my male counterpart will get paid 10 times more than me".
Feminist quotes from the icons to inspire you
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She added: "Not double, but 10 times for the same job. We only have this much left for the female actress. I mean, there’s two genders on this earth. Both are compelling, interesting, diverse, wonderful in all their own separate ways. And yet there’s an influx of male roles and there’s just not for women.”
This might be the ultimate first-world problem, but the super-wealthy are also much less likely to be women - and crucially - the women who are enormously rich are much, much less likely to have earned their own money.
Christy Walton - officially the richest women in the world with a net worth of $41.7billion - inherited a stake in Wal-Mart from her founder husband. It's a similar story for L'Oreal heiress Liliane Bettencourt ($40.7 billion) and Jacqueline Mars ($26.6 billion), who inherited money from her grandfather - founder of the sweet manufacturer Mars.
One woman who did make her own fortune is Elizabeth Holmes, who quit university to invent a new blood-testing firm. The company, Theranos, has been valued at $9 billion, and she own half of it. For context, she's also just 31 years old.
World’s richest: The Forbes list
The top 10 dollar billionaires and the source of their wealth
1 Bill Gates, $79.2bn, Microsoft (US)
2 Carlos Slim Helú and family, $77.1bn, telecoms (Mexico)
6= Charles Koch, $42.9bn, Koch Industries, including energy, manufacturing and plastics (US)
6= David Koch, $42.9bn. Koch Industries, including energy, manufacturing and plastics (US)
8 Christy Walton and family, $41.7bn, Wal-Mart (US)
9 Jim Walton, $40.6bn, Wal-Mart (US)
10 Liliane Bettencourt, $40.1bn, L’Oréal (France)
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