Michael Hui Koon-Man (Chinese: 許冠文) is a Hong Kong film comedian, scriptwriter and director.
He is the eldest of the Hui brothers (together with Ricky and Sam Hui) who remain three of the most prominent figures in Hong Kong entertainment circle. Michael Hui is considered by many critics to be the foremost comedian in the Hong Kong film industry before Stephen Chow.
He studied in La Salle College, and then earned a sociology degree from the United College, the Chinese University of Hong Kong. Michael remains the very few Hong Kong film artistes who holds a non-honorary degree from a university.
After a spell hosting quiz shows in TVB, Hui gained popularity in the Hong Kong entertainment industry with his variety show stints in the Hui Brothers Show. He then moved from television to film. Hui's first work was in a film by Taiwanese director Li Han-Hsiang called The Warlord (大軍閥 or "The Great Regime", 1972), where he played a farcical warlord in post-revolutionary China.
In 1974, he set up his own film company, the Hui Brothers Company, with Golden Harvest, with his brothers Ricky and Sam. Between 1974 and 2000 he was involved in over 20 films, mostly as actor and scriptwriter.