A very tan Ben Affleck and his brother changed from one set of suit jackets into another for an Esquire dinner party in Casey's honor in London last night. The boys are overseas doing a UK promotional tour of Gone Baby Gone and Ben's protective pose with Casey shows how close these two really are. We have a feeling the boys spend plenty of time goofing around with each other, but in a recent interview, Ben made it clear that it was all business on the set. He told the Daily Mail:

My brother Casey [who stars as a private detective] isn't in the movie because of who he is. Nobody who sees the film could possibly think that. It was my job to help Casey flourish. I knew that he would be great and that he was going to surprise people. When you are working with your brother, there is always the risk that the discussions could degenerate [into rows]. But we both knew we had to take it seriously.

Right from the start, Ben has assured us that Casey's role in the film was more than just a favor but the fact that he's still driving the point home shows that a big brother's work is never really done.

Lots more pics of Ben and Casey posing with their friends if you just read more.

Images include: Erin O'Connor, Christopher Bailey, Gillian Anderson, Mark Griffiths, Marc Quinn, Martin Amis, Isabel Fonseca, Hayley Atwell, Casey Affleck, Ben Affleck, Rosamund Pike

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