A Witness Out of the Blue is a 2019 Hong Kong crime thriller film produced by Derek Yee and written and directed by Andrew Fung.

The film stars Louis Koo as a robber who becomes a prime suspect of a new murder case in which the only witness is a talking parrot present during the scene.

The only apparent witness to the murder case is a talking parrot that was present inside the apartment room during the crime scene.

Edmund Lee of the South China Morning Post gave the film a score of 3.5/5 stars, praising the performances by Louis Koo and Louis Cheung, and describes the film as director Andrew Fung's best effort to date.

[4] Gabriel Chong of Movie Xclusive gave the film a similar score of 3.5/5, praising Koo's commitment to his role and the well-paced mystery from start to end.