Rachel Bilson is one of those girls with effortless personable style. Whether she's snapped in a cardigan and jeans while out shopping or a killer dress on the red carpet, she always looks impeccable. Rachel's style is so covetable, she was a target a few years ago for the Bling Ring -- that group of Hollywood teens who robbed celebrity homes in hopes of gaining access to their wardrobes and personal items.

All that aside, Rachel showed up to the premiere of The To-Do List this week looking just as stunning as ever, in an embellished floral print, cobalt blue Oscar de la Renta ensemble.

Rachel opted for minimal accessories, sticking with black Casadei pumps, a simple black clutch, and a poppy pink lip that complemented the blue in her dress pretty perfectly.

For more on Rachel's look, and to see all the previous looks of the week, click through the gallery!