Jessica Chastain is opening up about her unexpectedly cozy moment with Oscar Isaac at the Venice Film Fest. While a particular photo of them went viral, the actress says she's got impressive chemistry with other co-stars as well.«We've been friends for over 20 years,» Chastain told ET's Lauren Zima while reflecting on Isaac, who made headlines as he seemingly kissed her armpit while posing for photos on the red carpet at the Venice Film Fest on Sept 4.