Sienna Miller is set to replace Lindsay Lohan in The Best Time of Our Lives alongside Keira Knightley. The 25-year-old British-born actress has been offered Lohan's role after the 20-year-old pulled out just days before the start of filming. The cast also includes Cillian Murphy and Matthew Rhys. The Best Time of Our Lives is the story of two women, Caitlin MacNamara (Miller) and Vera Phillips (Knightley), who try to win the heart of poet Dylan Thomas. The project attracted a lot of publicity because it includes a steamy threesome between the two women and the poet. Filming is set to begin in May. | 
