The movie's co-writer Annie Mumolo plays the nervous passenger on the plane

One of the most hilarious scenes in the movie finds Annie having to sit in coach while the rest of the bridal party gets to fly in first class on their way to the bachelorette party.

Annie ends up sitting next to a woman who is equally scared of flying but is actually played by Annie Mumolo, who co-wrote the movie.

Though Mumolo was originally going to have a larger role, she became pregnant and instead decided to scale back her involvement.

She said: “I was seven months pregnant when we began shooting, and I had my son a week and a half after we wrapped. I couldn’t play that role, so we redeveloped it and we recast it.”