WATCH: HBO's 'Girls' Costume Designer Dishes Style Advice

(Photo courtesy of American Eagle)

Well, that was quick! Jenn Rogien, costume designer for HBO's hit-series Girls, wasted no time in jumping into her brand-new gig as Aerie's fit and style expert—it's only been a week since her appointment and already she's launched her first video for American Eagle's lingerie brand.

In the virtual advice column, aptly named "Meet Jenn Rogien," the style guru dishes on her favorite Aerie bras (naturally), explains why wearing the right size is so, so important (especially in lingerie!), and just like the rest of your wardrobe, your underpinnings should reflect your personality (aka go wild with prints).

Check out the full video, below, and tell us your thoughts in the comments!