Do you think this could set a precedent for other brands or celebrities to follow suit?

I’m very happy and feel fortunate to be part of a company that is willing to do that. I don’t have a deeper message – I really hope the initiative works and that we reach our goal, and it is an impressive and ambitious target. But other than that, I don’t have any judgements about other people. Obviously the more the merrier but I’m not trying to show anything but my support for BOSS. I wouldn’t be a part of it if I didn’t believe in it but I think it’s something very hard not to believe in. So in that sense I’m fortunate.

Why has charity work always been a big part of your life?

It’s something that my mother was really heavily involved in, working with charities my whole life. So it was something that I was brought up with and surrounded by, which I really admire her for. Now, being in a position where you can garner attention, negative and positive, it seems like a good place to shed some light on organisations that have some meaning to you. But it is an organic fit and I think regardless of whether I was an actress or had any type of profile, it was something I would do.

I also feel very lucky because you get to go into these situations that normal people would never be allowed into. I’ve sat down with Mai-Mai leaders in Congo, with 12 rebels with Kalashnikovs, interviewing them in these life-threatening situations. I am a complete adrenalin junkie. We’ve had to sign waivers saying that the British Embassy are not responsible for us if we go to these places. But you get access to places you would never dream of going to and you see how life really is in this world. It’s enormous and much bigger than how it seems in your own head.

And I think that perspective is something I really need because it’s so easy to get caught up in your own world –and comparative to yourself these problems seem huge. You go to Congo and you meet women who have been gang raped several times and you realise your own insignificance. I feel very lucky.

Interview: Sienna Miller