When Edward is on top of the bus, the people riding on tour buses next to him laughing and pointing at him weren't extras, but real tourists.
Idina Menzel, a Broadway veteran and Tony Award winner, does not sing in the movie. In an interview, Menzel stated she felt flattered to be hired solely as an actress.
Several non-singers made their singing debuts in this movie, including Patrick Dempsey. The only main character who does not sing is Nancy, played by Idina Menzel - who has two Tony award nominations and one win for Broadway musical singing roles.
The scene director Kevin Lima found the most challenging to shoot was the musical number "That's How You Know" in Central Park. The five-minute scene took seventeen days to finish due to the changing weather, which allowed only seven sunny days for the scene to be filmed. The filming was also hampered at times by Patrick Dempsey's fans.
The wedding dress that Giselle (Amy Adams) wore weighed forty-five pounds. A stunt double taught Adams how to move in the dress. She described it as "gruelling" since "the entire weight was on my hips, so occasionally it felt like I was in traction."