The best supporting actress category was also expanded: as well as Knightley, there were nominations for Hayley Atwell in A View from the Bridge, Michelle Dockery in Burnt by the Sun, Alexandra Gilbreath for Twelfth Night, Rachel Stirling for The Priory, and Ruth Wilson for A Streetcar Named Desire.
The winners will be announced on 21 March.
Story at the Guardian:
http://www.guardian.co.uk/stage/2010/feb/08/plays-musicals-olivier-awards-drama
Plus the full list of nominees:
http://www.guardian.co.uk/stage/2010/feb/08/olivier-awards-nominations-full-list