Bryce Dallas Howard has said she was scared for asking for more pay in the past in case she lost roles.
Howard also said that negotiating was easier for more established male actors who can afford to "have a manager as well as an agent".
"That's 20% out of your paycheck rather than 10%," she added.
The actress is the daughter of film-maker Ron Howard, who has directed films including Apollo 13, Frost/Nixon and Solo: A Star Wars Story.
"Even my dad has been shocked at how expensive it is to be a woman in the industry", she added.