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Gwyneth Paltrow donned head-to-toe Prada for the evening premiere of Contagion in Venice at the Italian city's annual film festival. In fact, the day before, Gwen wore a bright orange Prada number to the film's photo call.

Paltrow has a less glamorous look in the film ... she plays the victim of a virus that threatens the world population, alongside co-stars Matt Damon and Laurence Fishburne. The thriller was directed by Steven Soderbergh who recently announced he'd quit filmmaking to become a full-time painter.

Click thru to see the trailer ...

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Meanwhile, Keira Knightley sparkled in her evening gown at the premiere of her film A Dangerous Method. The traditional, beaded dress was in stark contrast with her more contemporary, multi-colored Mary Katrantzou number for her daytime photo call.