Joan Collins was every inch a 40s pinup girl in a daring throwback photo she shared on Wednesday ... Is this trend coming back? #metgala #corset." Joan appears to be referring to Kim Kardashian ...

"I play Roxanne and I have one scene where I'm locked in a fence fight with nothing but a corset and stockings on," Collins said wickedly in a break from rehearsals. She was at the launch of Una ...