After meeting on the set of the 2005 remake of Pride and Prejudice Rosamund Pike, Keira Knightley and Carey Mulligan cemented a sisterly bond that went beyond the screen.
In an interview with Vogue, Rosamund describes how the three British actresses created such a strong friendship.
"We had such a ball," explained Rosamund.
"It felt like the innocent days. We felt like a bunch of sisters and we were like sisters for ages afterwards. Carey, Keira and I used to see each other a lot. Since Carey has become so famous, I don't see her so much anymore, but there was a time after the film when she would stay with me in LA and we'd all hang out. Or Keira would come round for dinner all the time and we'd try and get together. I think that we all still feel it in some way - it's just that everyone's in different countries now."
The An Education actress, who is soon to launch her first bag collection with British fashion company LK Bennett, opens up about the difficulty in distinguishing acting relationships from real-life with friendships.
"There's something very magnetic that happens on set," the star revealed.
"You have this peculiar chemistry with people based on your characters. The weird thing is that that connection continues after the film. If you've played someone's sister or husband, then that magnetism stays. I always buy a magazine if Carey's on the cover - it has more resonance for me; I see it in a different way."