polo ralph lauren denim dress Belted Midi | Blue Denim fabric Paneled Denim Sleeveless Shirtdress

Then I saw a photo of Reese Witherspoon pairing a blue dress with a purple bag while promoting Big Little Lies in NYC (side note: Im so excited for the show to come back this weekend!)

Women's Cloud Gauze Midi Dress A lightweight blue cotton midi dress with a crinkled gauze texture, V-neckline, and adjustable waist

The long blue evening gown has a sheer corset-style bodice that wraps around to the lace-up back, while the fully-lined long skirt has a sequin-print sheer overlay that flows to the floor in an a-line shape

Zips up the back with original zipper

The host will likely appreciate your efforts and can offer guidance on how to dress to impress for the occasion