Who's that girl? It's the best man, obviously.

On Tuesday's new episode of New Girl (9/8c, Fox), Jess' dad Bob (Rob Reiner) asks her to be the best man at his wedding to Ashley (Kaitlin Olson). However, things go off the rails quickly on their big day when Bob accidentally sees Ashley in her wedding dress before they exchange "I do's."

The most memorable TV weddings

"Bob is very upset and thinks that they're cursed," Olson says in this exclusive sneak peek. But are they really cursed? Or is Jess (Zooey Deschanel) to blame for their wedding day blues?

Check out the exclusive video below to find out Jess' big mistake and her shocking middle name!

New Girl airs Tuesdays at 9/8c on Fox.