The Edge of Love is a 2008 British biographical romantic drama film directed by John Maybury and starring Keira Knightley, Sienna Miller, Cillian Murphy and Matthew Rhys. The script was written by Knightley's mother, Sharman Macdonald. Originally titled The Best Time of Our Lives, the fictional story concerns Welsh poet Dylan Thomas (played by Rhys), his wife Caitlin Macnamara (played by Miller) and their married friends, the Killicks (played by Knightley and Murphy). The film premiered at the Edinburgh International Film Festival.