Answer: Juliet
Keira played Juliet, the bride of Peter (played by Chiwetel Ejiofor) and the object of the affection of Peter's best friend, Mark (Andrew Lincoln). Keira started acting in 1993 when she was seven, and worked primarily in made-for-TV movies. In 1999 she played Sabe, Queen Padme's decoy in 'Star Wars Episode One: The Phantom Menace'. The role that brought her to stardom was that of Jules Paxton in the wonderful film 'Bend It Like Beckham'. Since then, she has starred in 'Love Actually', 'King Arthur' (as Guinevere), 'Pride and Prejudice' (as Elizabeth Bennett, a role for which she received an Oscar nomination) and as Elizabeth Swann in 'The Pirates of the Caribbean' movies.
Mia, the minx who makes a play for her married boss Harry (Alan Rickman) was played by German actress Heike Makatsch, who lived with actor Daniel Craig, the new James Bond, for five years before ending the relationship. Joanna Page, a Welsh actress, played Judy, who falls in love with Jack while they are both working as stand-ins for actors in a blue movie.
Karen was played by the amazing Emma Thompson who gave a very moving performance as a middle-class wife and mother. Thompson also played opposite Hugh Grant and Alan Rickman in 'Sense and Sensibility' (1995), with Thompson as Elinor Dashwood, Grant as her love interest Edward Ferrars and Rickman as Colonel Christopher Brandon, who loves Elinor's sister Marianne (Kate Winslet). And, of course, every 'Harry Potter' movie fan knows Thompson as Professor Sybil Trelawney, who teaches Divination at Hogworts and Alan Rickman as Severus Snape.