Robert Downey Jr. recorded the song "Smile" which can be heard on the soundtrack from the movie. However it was not used in the film.
A body double had to be brought in for the nude scene between Charlie (Robert Downey Jr.) and Mildred Harris (Milla Jovovich). Jovovich was only 16 years old at the time and therefore too young to participate in a nude scene.
Over 200 hours of footage was shot, the original cut of the film was nearly 4 hours long.
George Hayden (Anthony Hopkins) is the only principal character in the entire film who is fictional.
Richard Attenborough cast Marisa Tomei in the role of Mabel Normand after seeing her performance in the '30s set comedy Oscar (1991) on a transatlantic flight.
Co-producer Diana Hawkins was the one who suggested to Richard Attenborough the idea of making a Chaplin biography film, knowing that he was a fan of Chaplin.
Bryan Forbes's discarded script had a different beginning and focused on some darker elements of Chaplin's life and personality. Although his script was not used, the WGA ruled that Forbes got writing credit because much of the film's framework was derived from his script.
Attenborough's director's cut was 147 minutes, 12 minutes longer than the version shown in cinemas. Attenborough has said that the cuts damaged the film.
Originally meant to be entitled "Charlie", as that's how he was known among his friends and family, but since he was more universally known as Chaplin, that ended up being the title.
Jim Carrey was considered for the role of Charlie Chaplin.