Actress Maggie Gyllenhaal attends the 'Nanny McPhee And The Big Bang' world film premiere at the Odeon West End on March 24, 2010 in London, England. (Getty Images)more pics » Maggie Gyllenhaal appeared in London for the premiere of Nanny McPhee And The Big Bang last night and told how, despite spending lots of time in the UK, she still has trouble understanding the local people.
"I have to do a lot of translating, 'what do they mean by that?' But I love London, like, love it."
Maggie added she is also wary of how she speaks too, as some American terms, such as "fannypack," and "pants" have a different meaning in England -- with the former having rude connotations and the latter referring to underwear rather than trousers.
She added: "London surprises me and continues to surprise me - and when I'm here, I'm always a little on guard of what I say, exactly for that reason."
Emma Thompson, who stars as the titular nanny character, also attended the premiere.
Maggie plays Mrs. Docherty, the mother of a set of unruly children, who is looking after the family farm while her husband is away, in Nanny McPhee And The Big Bang.