Cillian Murphy and Matthew Rhys have signed on to join Keira Knightley and Lindsay Lohan in "The Best Time of Our Lives."

The independently financed film chronicles the relationships among Welsh poet Dylan Thomas (Rhys), his wife Caitlin (Lohan), his childhood friend Vera Phillips (Knightley) and her eventual husband William Killick (Murphy).

John Maybury is directing.

Murphy stars in Ken Loach's Palme d'Or winner "The Wind That Shakes the Barley," which recently opened in North America. Rhys co-stars as Kevin Walker on ABC's "Brother & Sisters."