Actress Michelle Williams is slated to make an appearance on Capitol Hill on Tuesday to advocate for House Democratic legislation aimed at closing the gender pay gap.

Williams is expected to participate in a press conference with Speaker Nancy Pelosi Nancy PelosiPelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare House lawmakers reach deal to avert shutdown Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill MORE (D-Calif.) and members of the Democratic Women's Caucus to mark Equal Pay Day and last week's passage of Democrats' Paycheck Fairness Act, a top legislative priority.

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Williams found herself at the center of the debate on gender inequality in Hollywood last year after USA Today reported that she was paid far less than her "All the Money in the World" co-star Mark Wahlberg for reshooting scenes to cut out a performance by Kevin Spacey, who has faced multiple allegations of sexual misconduct.

Wahlberg was paid $1.5 million for reshooting his scenes, while Williams was paid an $80 per diem totaling less than $1,000.

She told Vanity Fair last year that she learned of the pay gap through the media like everyone else.

"A private humiliation became a public turning point," Williams said at the time. She explained that she didn't push for more money given the situation with Spacey that led to reshooting the scenes.

"It wouldn't have occurred to me to ask for money for the re-shoots. I just wanted to do the right thing on his behalf," Williams said, referring to Anthony Rapp, an actor who alleged that Spacey sexually assaulted him as a teen.

Wahlberg later donated his $1.5 million earnings to Time's Up in response to the backlash.

House Democrats intentionally passed their Paycheck Fairness Act ahead of Equal Pay Day on Tuesday. The day is meant to symbolize how far into the year women must work to make what men made in the previous year because women earn about 80 cents for every dollar men earn on average.

Their bill would ban employers from asking prospective employees about salary history or retaliating against workers who discuss wages, require large businesses to report annual compensation data, and authorize grants for negotiation training programs. It passed 242-187, with seven Republicans voting with all Democrats in support.

House Republicans led by Rep. Elise Stefanik Elise Marie StefanikRepublicans cast Trump as best choice for women The Hill's Morning Report - Presented by Facebook - Pence rips Biden as radical risk GOP women offer personal testimonials on Trump MORE (R-N.Y.) introduced a counterproposal last week that would ensure workers could discuss salaries with colleagues while giving employers the ability to set "reasonable limitations" on when that activity could take place and create a "self-audit" system to encourage businesses to conduct their own pay analyses.