Blake Lively and Anna Kendrick attend London premiere of "A Simple Favor"

Reuters - Blake Lively and Anna Kendrick attended the London red carpet premiere of their new movie "A Simple Favor" on Monday (September 17). The leading duo posed for pictures and chatted to fans at the event at the BFI Southbank. The film, directed by Paul Feig, is a darkly comic tale which centers on a hard-working single mum Stephanie Smothers (Kendrick) who puts all her efforts into investigating the disappearance of her best friend, Emily (Lively), and reveals very unexpected details about her life. The movie is released in UK cinemas on September 20th.