Hollywood star Rachel Griffiths will face federal MPs in Melbourne at a parliamentary inquiry on slavery.
Ms Griffiths, a patron of the charity Hagar, will help the organisation deliver its submission to the inquiry into establishing a Modern Slavery Act in Australia on Wednesday.
MPs are examining whether Australia should adopt an act similar to one in the United Kingdom.
In its submission, Hagar says Australian companies should have to publicly report on the steps they have taken to ensure there is no slavery in their business.
They are also calling for increased reporting for companies that cover sectors with a high risk of forced labour.
Hagar was launched in 1994 in Cambodia and now also works in Afghanistan and Vietnam to help survivors of trafficking recover from trauma and reintegrate into society.
Ms Griffiths joined the organisation in 2012 and worked on a campaign lobbying government to prevent paedophiles from being able to travel overseas.
At the inquiry hearings on Tuesday, the Australian Council of Superannuation Investors also called for new laws requiring Australian firms to report annually on how they are ensuring that their global supply chains are free of slavery risks such as forced labour and deceptive recruiting.
ACSI chief executive Louise Davidson said laws requiring companies to report yearly on slavery risks would make them more accountable and allow greater scrutiny from investors and the broader community.
© AAP 2017 Photo credit: Dennis Van Tine/ABACAPRESS.COM