London: Since finishing her stint as Hermione in the Harry Potter movies, Emma Watson has become a glamorous fixture on red carpets around the world.

But now, for her latest film role, the 25-year-old is barely recognisable as she disguises herself as a dowdy nun. The actress says her role in the £20 million political thriller Colonia Dignidad is her most challenging yet. She adds: ‘It’s the hardest part I’ve ever had to play. But also the most satisfying. It felt like the right thing to do.’

The movie tells the true story of the Nazi cult called Colonia Dignidad, which operated in Chile during the reign of dictator General Augusto Pinochet in the 1970s.–CM

Watson stars as Lena, whose husband, played by Rush star Daniel Bruhl, ‘disappears’ into the sinister cult.

She disguises herself as a nun to infiltrate the organisation.

A source said: ‘Emma is determined to distance herself from Harry Potter and this is her big push to be taken seriously. She gives an amazing performance and is being tipped as an Oscar contender. She is dowdy in this movie - she’s undergone a make-under.’ The film opens in Germany next month and in Britain later this year.