Olivia Wilde Had the Most Brilliant Reason For Wearing This Cutout Dress to the CFDA Awards

When we heard Olivia Wilde would be Rosie Assoulin's date for the CFDA Awards, we couldn't wait to see her look. Olivia's worn the designer on red carpets before, proving she can rock the crap out of Rosie's avant-garde cutouts and unexpected details.

Olivia pulled through yet again, this time accessorizing with a pink Edie Parker clutch, mosaic-tiled jewels that matched her hunter-green theme, and Giuseppe Zanotti heels. But Olivia had a few key reasons for slipping into her standout gown, emphasizing the fact that it had a window at the side "so the babe could clearly hear Beyoncé's speech."

Read on to see Olivia's hilarious Instagram caption in full, along with the expecting mom's outfit from all angles. It's certainly safe to say she was one of the evening's best dressed — and it's all thanks to that bump.