<P> Daniel (Liam Neeson), Karen's friend, mourns the recent death of his wife Joanna, as he tries to raise his stepson Sam (Thomas Sangster) alone . Sam has fallen for an American classmate, also named Joanna (Olivia Olson), and, after discussion with his stepfather, decides to learn the drums so that he can accompany her in the big finale for their school's Christmas pageant (the same one that David's nephew and Karen and Harry's children are in). After Sam feels that he missed his chance to make an impression on her, Daniel convinces Sam that he must go catch Joanna, who is returning to the US, at the airport that night and show her how he feels, lest he regret it . Sam runs away from the airport security and says hi to Joanna, who then kisses him on the cheek . Meanwhile, Daniel meets Carol (Claudia Schiffer), the mother of one of Sam's schoolmates . </P> <P> Sarah (Laura Linney) first appears at Juliet and Peter's wedding, sitting next to her friend Jamie . She is an American who works at Harry's graphic design company and has been in love for years with the company's creative director, Karl (Rodrigo Santoro). They finally connect at the Christmas party and he drives her home . They kiss, but before more can occur, they are interrupted by her mentally ill brother, Michael, phoning from a mental care facility . Sarah and Karl's evening tryst is aborted and Karl leaves . On Christmas Eve both are working late and, when Karl leaves, he only wishes her a merry Christmas . Michael phones Sarah and she goes to stay with him, sharing her Christmas scarf . </P> <P> After unsuccessfully attempting to woo various English women, including Mia and Nancy (Julia Davis), the caterer at Juliet and Peter's wedding, Colin Frissell (Kris Marshall) informs his friend Tony (Abdul Salis) he plans to go to America, where he is convinced that his Britishness will be an asset . Landing in Milwaukee, Wisconsin, Colin meets Stacey (Ivana Miličević), Jeannie (January Jones), and Carol - Anne (Elisha Cuthbert), three stunningly attractive women who fall for his Basildon accent and invite him to stay at their home, where they are joined by roommate Harriet (Shannon Elizabeth). </P> <P> John (Martin Freeman) and Judy (Joanna Page) are professional body doubles for films . They meet for the sex scenes in a film for which Tony is a production assistant . John tells Judy that "It is nice to have someone (he) can just chat to ." While the two are perfectly comfortable being naked and simulating sex on - set, they are shy and tentative off - set . Carefully pursuing a relationship, they attend the Christmas pageant (involving David and Natalie, Harry and Karen's children, Daniel and Sam, et al .) at the local school with John's brother . </P>

Who plays colin's friend in love actually