Red carpet clip of Oscar Isaac sniffing Jessica Chastain's armpit goes viral

Oscar Isaac and Jessica Chastain were at the Venice Film Festival to promote their new drama series 'Scenes From A Marriage'. Photo: Reuters

The red carpet antics of actor Oscar Isaac have gone viral, with a clip of him sniffing co-star Jessica Chastain's armpit viewed more than 8.5 million times since it was posted on Sunday (Sept 5).

Isaac, 42, and Chastain, 44, who were at the Venice Film Festival to promote their HBO drama series Scenes From A Marriage, were posing on the red carpet with her arm draped on his shoulder.