Kirsten shocked by co-star's acid tongue

Kirsten Dunst was left stunned by Wimbledon co-star Paul Bettany's frequent foul language on the set of the romantic comedy.

The Spider-Man 2 actress was completely unprepared for Bettany's sense of humour and love of profanity.

She says: "He uses the 'C' word more than anybody I've ever met, mostly for guys, but he completely uses it like he's saying the word 'water'. I mean, he has the worst mouth ever."