For her first outing on Friday, the Newsroom actress attended the Robocop photocall wearing a flirty backless polkadot jumpsuit and white strappy heels.
It could have used some tailoring, but it was still a nice daytime outfit for sunny San Diego.
Flash forward a couple hours later and we had a whole new Olivia! Miz Munn arrived at the Playboy and Universal Pictures' Kick-Ass 2 party looking seksi in a simple black dress the featured a flashy rhinestone chain collar.
A pair of platform pumps and a metallic gold Stark box clutch polished off Olivia's Kiss-Ass ensemble.
We bet both looks made at least a few fanboys geek out!