Screenwriter Paul Feig, who once was an aspiring stuntman himself, is a fan of Jason Statham's action movies. Feig tailored Statham's Rick Ford character in the film especially for the actor to play.
Bobby Cannavale got involved in the film because his girlfriend, Rose Byrne, joined the cast as Rayna.
According to Paul Feig, Rayna was originally a 19-year-old, and the character had to be rewritten once Rose Byrne was cast in the role.
Melissa McCarthy and Paul Feig are neighbors and she first heard about the project over dinner. She subsequently asked to read the script.
The Hungarian capital city of Budapest, doubled for both the capital cities of Paris in France and Rome in Italy.
Ben Falcone: The American tourist in Budapest, Hungary asking directions for Popeyes chicken. He is the real-life husband of actress Melissa McCarthy
Paul Feig: Uncredited, as a drunk guest who walks into a wall and falls down in the hallway of Hôtel Modière when Susan Cooper (Melissa McCarthy) arrives at the hotel in Paris.