The Egyptian actress faces trial next month charged with a public indecent presence after attending a closing ceremony at the Cairo Film Festival wearing carbonaceous garment that revealed the entire leg.
The trial of Rania Youssef, due to begin on January 12, follows an appeal to the chief prosecutor by a group of lawyers against the actress.
Egypt is a largely conservative country with a Muslim majority.
The Arab country of 100 million people has kept the traces of secularism despite decades of growing religious conservatism, but the Youssef case serves as a reminder that Islamic fundamentalism is still affecting society five years after the army toppled the Islamist president.
Yusef faces five years in prison if convicted.