The actors in the film didn't always actually speak their lines in the scenes. The director had them focus their energy on practicing body language, facial expressions and dance moves instead. (Source)

Dujardin and Bejo practiced their final dance scene every day for five months, in the same studio that Gene Kelly and Debbie Reynolds used for Singin' in the Rain (1952). Looking back now, Bejo says, "Sometimes it's like my feet still hurt." (Source)

While shooting the film, Jean DuJardin lived in a 1930s house in Hollywood. Talk about immersing yourself in your work. (Source)

The film was not originally shot in black and white—it was converted from color after filming. (Source)