United Kingdom, April 16 -- Carey Mulligan's friends aren't concerned by her fame.

The 40-year-old actress has enjoyed huge success in Hollywood, starring in movies such as Drive, Inside Llewyn Davis and The Great Gatsby - but Carey manages to escape the glitz and glamour of the movie business whenever she returns to her home life in Devon, south-west England.

Speaking to The Hollywood Reporter, Carey explained: "I was going on to a friend about One Battle After Another, saying it's the greatest thing I've seen in the last 10 years, and she was like, 'Who's in it?'

"I was like, 'Leonardo DiCaprio and Sean Penn.' And she said, 'Which one's that? Is he from Shaun of the Dead?'

"I was like, 'I can't f****** believe you don't know who Sea...