BERLIN — Irish actress Antonia Campbell-Hughes (“Albert Nobbs”) and Danish thesp Thure Lindhardt (“Keep the Lights On”) are toplining Sherry Hormann’s “3096,” the fact-based English-language pic about Natascha Kampusch, the Austrian girl who was kidnapped and held hostage in a basement for more than eight years.

Campbell-Hughes will play Kampusch, who was kidnapped in 1998, at the age of 10, in Vienna by Wolfgang Priklopil while on her way to school. Priklopil, who will be played by Lindhardt, kept her imprisoned in a specially built cellar for 3,096 days until she managed to escape in 2006. The kidnapper committed suicide on the same day by leaping in front of an oncoming train.

“We wanted to take an outside-the-box approach,” said Hormann. “Bringing an outsider’s point of view, Antonia Campbell-Hughes and Thure Lindhardt are perfectly suited to capture the overwhelming essence of the story: It’s a universal story — the insanity of the act lies within the act itself, no matter where it takes place.”

The up-and-coming Campbell-Hughes was feted as Ireland’s Shooting Star this year at the European Film Promotion’s annual Berlinale event celebrating young talent. She has starred in such films as Jane Campion’s “Bright Star” and Rebecca Daly’s “The Other Side of Sleep” as well as Johannes Roberts’ upcoming creature feature “Storage 24” and Kieran Evans’ love story “Kelly + Victor.”

In addition to Ira Sachs’ “Keep the Lights On,” Lindhardt has appeared in such U.S. films as Ron Howard’s “Angels & Demons” and Sean Penn’s “Into the Wild,” as well as Ole Christian Madsen World War II thriller “Flame & Citron,” Nicolo Donato’s “Brotherhood” and Neil Jordan’s upcoming “Byzantium.”

Amelia Pidgeon will play the young Kampusch.

Cinematographer Michael Ballhaus (“The Departed”) will lens the Constantin Film production, which begins principal photography in Munich in May. Martin Moszkowicz, Constantin head of film and TV, is producing.