open back prom dress Beaded Backless With Slit 48073 See long sequin Chic and Holland AR330283 -
Description
For black tie weddings, elegance is key

Dior posted a closer look at Lawrence's gown on Twitter that included an illustration of the final look

It took a while to get it but its worth it

For more ways to understand the dress code see these posts on what to wear to an October wedding, what to wear to a November wedding, what to wear to a fall wedding, and ideas for a dressy casual September wedding guest

Cascading, gathered skirt

Review: This dress is so flattering
