Who: Lizzy Caplan.
When: Saturday, July 9.
Where: The premiere of Ghostbusters in Hollywood, California.
What: A white Erdem Pre-Fall 2016 gown.
Why: It's not even her movie, but Caplan steals the red carpet out from under Kate McKinnon and co. at the Ghostbusters premiere. This ruffled Erdem dress is clean and crisp; the ruffles are almost twee but Caplan's mod, square bag tones down the cuteness. White may be everywhere come summertime, but it doesn't have to be dull.