The class-action lawsuit, filed at Manhattan Supreme Court in New York City, accuses the former Full House stars of failing to properly compensate around 40 interns who were allegedly asked to work 50-hour weeks with barely any breaks.

In the papers, lead plaintiff Shahista Lalani, 29, alleges she was doing the same work as employees at the Olsens' fashion brand The Row, but without any pay, stating, "I was doing the work of three interns. I was talking to (my supervisor) all day, all night. Emails at nighttime for the next day, like 10pm at night... (I was) inputting data into spreadsheets, making tech sheets, running personal errands for paid employees, organising materials, photocopying, sewing, pattern cutting, among other related duties."

A spokesperson for the 29-year-old twins' billion-dollar entertainment and fashion empire has since responded to the claims, denying any truth to the allegations.

A statement to People magazine reads: "As an initial matter, Dualstar is an organization that is committed to treating all individuals fairly and in accordance with all applicable laws.

"The allegations in the complaint filed against Dualstar are groundless, and Dualstar will vigorously defend itself against plaintiff’s claims in court, not before the media. Dualstar is confident that once the true facts of this case are revealed, the lawsuit will be dismissed in its entirety."