Shanghai
Knights

It helps but is not strictly necessary. Shanghai Noon (2000) establishes the characters of Chon Wang and Roy O'Bannon and their friendship, which gives the sequel's dynamic more emotional texture. However, Shanghai Knights provides enough context in its opening sequences to be enjoyed as a standalone film — the relationship between Chan and Wilson is so naturally comedic that new viewers will understand the dynamic immediately. That said, Shanghai Noon is a very good film in its own right and watching both in order enhances the experience of Knights considerably. Both films were written by Alfred Gough and Miles Millar, who later created the TV series Smallville.

Yes — Donnie Yen plays Wu Chow, the film's secondary villain: a Chinese revolutionary who has allied himself with Lord Rathbone for his own political ends. The casting is significant because by 2003 Yen was already a major Hong Kong action star (his collaboration with Yuen Woo-ping on Iron Monkey had already made him a household name in Asia), and his fight sequence with Jackie Chan was one of the film's most anticipated set-pieces. The two men share a genuine mutual respect and the clash of their respective fighting styles — Yen's more aggressive, power-based approach against Chan's evasive, improvisational technique — makes for a genuinely exciting encounter. It would be years before Yen achieved his global breakthrough with the Ip Man series, but fans of Hong Kong cinema recognised his importance immediately.

Partially. The production used a combination of genuine London locations, Prague standing in for Victorian London streetscapes (its preserved 19th-century architecture is frequently used for period productions), and studio sets built in Los Angeles. Buckingham Palace exteriors were shot on location in London, as were several establishing shots of Westminster and the Thames. The majority of the street-level action sequences — including the famous Singin' in the Rain fight — were filmed on period-dressed sets and Prague locations that doubled convincingly for Victorian Whitechapel and central London. The production design team did extensive research into late Victorian London architecture to ensure visual coherence across the different filming locations.

A third film, tentatively discussed under the title Shanghai Dawn, has been in various stages of development discussion for over fifteen years without ever being greenlit. Both Jackie Chan and Owen Wilson have expressed willingness to return, and screenwriters Alfred Gough and Miles Millar have been attached to the project at various points. The primary obstacle has been Disney's shifting priorities and the challenge of finding a production window that suits all parties. As of 2025, no official announcement of a third film has been made. Given Chan's age and the time elapsed since Shanghai Knights, any third film would need to be substantially reimagined — though Chan has shown repeatedly that he can still anchor an action-comedy well into his sixties.