Sundance 2014: Laggies, review - Telegraph Dir Lynn Shelton. Starring: Keira Knightley, Chloe Grace Moretz, Sam Rockwell, Mark Webber. 100 mins Costume drama favourite Keira Knightley ditches the corsets and puts on an American accent in this romantic comedy of female arrested development. She plays Megan, a twentysomething daddy's girl, who despite being in a seemingly idyllic relationship with her prom sweetheart Anthony (Mark Webber), seems to have no real motivation in life. As pressure mounts at a friend's wedding, she flees, only to bump into a group of teenagers, led by Annika (Chloe Grace Moretz). Annika is a fesity kid who seems to possess all the freedoms the older woman has lost. A spot of bonding over illegal beer later and Megan decides to take a 'time-out' from her life, concocting a cover story so that Annika's divorcee dad Craig (Sam Rockwell) will let her stay for a few days that are - thanks to the standard romcom playbook - about to change her life. Humpday director Lynn Shelton usually works from a loose script combined with improvisation but here debutante Andrea Seigel takes the writing honours, and while she shows potential, she sticks to a tried and tested formula at the expense of believability. This means that the film works better in its intimate moments than its grand gestures. Knightley is endearingly gauche and the chemistry with Webber and Rockwell crackles, but the plot strong-arms the characters into increasingly contrived and overly familiar positions that leave you longing for the more relaxed vibe of Shelton's earlier films.