Call Me by Your Name’s Armie Hammer, Luca Guadagnino, and Timothée Chalamet. Photo: Kevin Winter/Getty Images The new film Call Me by Your Name is about a life-changing affair between young Elio (Timothée Chalamet) and grad student Oliver (Armie Hammer), but what went on behind the scenes was just as significant. As Hammer told us recently, director Luca Guadagnino fostered an environment on set t