This site has posted an article which includes an interview with Matthew Macfadyen on Anna Karenina:
Invited to reunite with the filmmakers and leading lady with whom he made “Pride & Prejudice,” BAFTA Award winner Matthew Macfadyen leapt at the chance to portray Oblonksy, Anna’s brother. The actor enthuses, “Oblonsky is incorrigible; he’s disarmingly direct and brings humor and warmth to the story as he tries to help the people he loves and cares about, particularly in attempting to be a matchmaker for his friend Levin.
“Oblonsky is one of those people who lights up a dinner party when they come in. He has a wandering eye. He likes the pleasures of the flesh, drinking and eating; to me, he was a very attractive character because he doesn’t suffer from terrible introspection. I don’t see him as ‘a bad man,’ and I hugely enjoyed playing this part – except for the moustache I had to grow.”
“Matthew is a hoot in this role,” enthuses Emmy Award-winning actress Kelly Macdonald, who signed on to play Dolly, wife of Oblonsky and sister-in-law to Anna. “He’s played Oblonsky in just the right way: charismatic, frustrating, lovable – and selfishly addicted to passion.”
Glamour UK has posted an exclusive clip from Anna Karenina. In it, Keira (Anna) is starting to be shunned by society. You can watch the clip 