The English Patient star features in the Sally Potter comedy as a politician who celebrates her promotion to minister in Britain's Shadow Cabinet with a party, only for the bash to end in disaster.

The black and white movie was shot in real time, and Kristin admits the time constraints put a lot of pressure on the cast and crew.

Speaking at Germany's Berlin Film Festival, where The Party is in competition for the coveted Golden Bear award, the actress reveals it was "almost like doing a play".

She recalled feeling "a sort of panic, knowing that we had two weeks to shoot it," adding, "We had to get it right the first time, because there was no room for multiple takes."

Other films screening in Berlin's main competition include Danny Boyle's T2 Trainspotting, the follow-up to his 1996 movie about a gang of Scottish drug users, and Final Portrait, Stanley Tucci's biopic of Swiss painter Alberto Giacometti.

Total Recall director Paul Verhoeven is presiding over the main jury, alongside Diego Luna and Maggie Gyllenhaal, among others. The winners will be announced on 18 February (17).