Sienna Miller’s biggest roles recently have been in the Leveson Inquiry and Rebekah Brooks’s trial. Now she’s starring in Oscar contenders such as American Sniper and Foxcatcher. For spring/summer 2015, she’s looking cool in denim – one of this season’s key trends

Photographers: Driu Crilly and Tiago Martel

Fashion editor: Jo Jones

Make-up: Kelly Cornwall at Premier using MAC

Hair: Raphael Salley at Streeters using Schwarzkopf Essence Ultime, developed with Claudia Schiffer

Fashion assistant: Kathleen Wright