Keira Knightley's co-star tried to teach her dance routines from 'Mamma Mia!'.
The slender actress - who plays Georgiana Cavendish, the Duchess of Devonshire, in new period drama 'The Duchess' - admits she couldn't get the hang of the intricate moves.
She said: "Dominic is great. He tried to teach me some of the dance routines from 'Mamma Mia!', at which I completely failed!"
Keira also revealed she has more male friends because she finds it hard to deal with female relationships.
She added to Glamour magazine: "I don't think I am very good at figuring out female friendships. I think they are quite tricky to navigate.
?I have a lot of friends who are guys and I find that manipulation and jealousy don't come into it as much, whereas those things can happen easily between women."
From cheeky presentations to dazzling gowns, check out these hot SAG Award pics. [Gallery]
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