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Fung Lam averages 5.08 across 4 rated films as a writer, ahead of Mark Wu at 4.60.
Dot size shows IMDb votes. Films with fewer than 1,000 votes sit on the baseline.
| Lan Kwai Fong | 2011 | · | Writer | Writer |
| Lan Kwai Fong 2 | 2012 | · | Writer | Writer |
| Due West: Our Sex Journey | 2012 | 5.3 | as James, Director, Writer | Writer |
| Iceman | 2014 | 4.8 | Writer, Actor | Writer |
| Iceman: The Time Traveller | 2018 | 4.0 | Writer | Writer |
| Atonement | 2025 | · | Writer, Director | Writer |