The Deep Blue Sea is a 2011 British romantic drama film written and directed by Terence Davies and starring Rachel Weisz, Tom Hiddleston, and Simon Russell Beale.

It is an adaptation of the 1952 Terence Rattigan play The Deep Blue Sea about the wife of a judge who engages in an affair with a former RAF pilot.

Her suicide attempt fails and as she recovers, the story of her affair and her married life is played out in a mosaic of short and sporadic flashbacks.

The film takes its title from her dilemma of being caught between the devil and the deep blue sea – two equally undesirable situations.

The website's consensus reads, "Featuring an outstanding performance by Rachel Weisz, The Deep Blue Sea is a visually stunning, melancholy tale of subsumed passion.