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.

The story is loosely based on real events and people, drawing on Rebekah Gilbertson's idea and David N. Thomas' 2000 book Dylan Thomas: A Farm, Two Mansions and a Bungalow. He has since written further about Dylan and Vera, highlighting the several deceits in the film that trivialised their friendship. He has described how Dylan and Vera were related as cousins, and the extent to which their families inter-married, farming together as neighbours on the Llansteffan peninsula in Carmarthenshire.