20 Things You Didn't Know About Gone Girl

Arguably the movie's most intense scene is the sequence in which Amy engages in sex with Desi, only to slash his throat with a box-cutter half-way through.

The scene required intense preparation by both actors, with Fincher even insisting that the two spend two hours together on set alone to rehearse it away from the rest of the crew.

But Pike's primary method for choreographing the scene was to use a Dora the Explorer doll gaffer-taped to a wooden post, which she practised with at home before coming to set.

According to Pike herself, she found this preferable to asking her husband to practise the scene with her.