Top Billed Cast

1. 

   Jesse Eisenberg

   Simon James / James Simon

2. 

   Mia Wasikowska

   Hannah

3. 

   Wallace Shawn

   Mr. Papadopoulos

4. 

   Yasmin Paige

   Melanie

5. 

   Noah Taylor

   Harris

6. 

   James Fox

   The Colonel

7. 

   Cathy Moriarty

   Kiki

8. 

   Phyllis Somerville

   Simon's Mother

9. 

   Gabrielle Downey

   Strange Woman

10. 

    Jon Korkes

    Detective

11. 

    Craig Roberts

    Young Detective

12. 

    Kobna Holdbrook-Smith

    Guard / Doctor

13. 

    Susan Blommaert

    Liz

14. 

    Bruce Byron

    Skinhead

15. 

    J. Mascis

    Janitor

16. 

    Tony Rohr

    Rudolph

17. 

    Karima Riachy

    Secretary

18. 

    Tim Key

    Care Worker

19. 

    Andrew Gruen

    Man on Train

20. 

    Kim Noble

    Box Man / Guard 1

21. 

    Morrison Thomas

    Coughing Man

22. 

    Sally Hawkins

    Receptionist at Ball

23. 

    Lloyd Woolf

    Investigator

24. 

    Lydia Fox

    Well-Dressed Woman at Ball / Test Invigilator

25. 

    Stuart Silver

    Waiter / 'The Replicator' - Guard 2

26. 

    Chris Morris

    Workers' Services Executive

27. 

    Chris O'Dowd

    Nurse

28. 

    Donal Cox

    Priest

29. 

    Kierston Wareing

    James' Funeral Date

30. 

    Paddy Considine

    'The Replicator' - Jack

31. 

    Dirk Van Der Gert

    'The Replicator' - Head Judge

32. 

    Liam Bewley

    'The Replicator' - Wise Judge

33. 

    Gemma Chan

    'The Replicator' - Glamourous Judge

34. 

    Nathalie Cox

    'The Replicator' - Jack's Wife

35. 

    Daniel Chapple

    Executive Worker (uncredited)

36. 

    Martin Crossingham

    Paramedic (uncredited)

37. 

    Danny

    Singer (uncredited)

38. 

    Catherine Delaloye

    Air Hostess (uncredited)

39. 

    Lukas DiSparrow

    Resident (uncredited)

40. 

    Joanna Finata

    Bar Girl (uncredited)

41. 

    Jeanie Gold

    Waitress (uncredited)

42. 

    Steve Saunders

    Moaning Man on Trolley (uncredited)

43. 

    Rade Šerbedžija

    Frightening Old Man (uncredited)

44. 

    Natalia Warner

    The Girl (uncredited)