updated 05/21/2012 AT 11:30 AM ET
•originally published 05/22/2012 AT 10:40 AM ET
But there’s nothing like a Hawaiian vacation to turn that around.
Normally reserved in both her fashion sense and her facial expressions, Olsen, 25, let loose while on holiday, grinning in the surf in a printed bikini top and black bottoms.
The actress and fashion designer (and one of Vogue’s best dressed) was photographed taking a dip in the Pacific and even smiling broadly for photographers last week.