The biopic is, in many ways, a tricky proposition, a form where the carefully-researched realism of history and the emotional impact of drama can blend in a uniquely powerful way. The flip side is the difficulty of doing justice to the memory of a man who lived, especially one who is revered throughout the fashion world. “When you’re playing an icon such as Yves Saint Laurent,” says Pierre Niney, the 25-year-old French actor who does just that in the new film Yves Saint Laurent, “people have their own different expectations, so it’s hard to find the right balance. It’s hard to play someone who existed because of those expectations, but at the same time, he existed, so you have the model.”