She says: 'We both had little coverings on the pieces that we didn't want people to see. We spent the most time saying to each other, 'You know, I think your little plastic covering may be coming off a little. Let's get them to put some glue on there.

'We rehearsed the scene fully clothed, without anyone in the room - just us and (director) Todd (Field), and we just got a general shape of the scene so we knew what to expect. We did look out for each other and we laughed a hell of a lot. It sounds ridiculous but at a certain point you forget that you're naked with a relative stranger.

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