Henry Thia (born 25 February 1952), also known as Alamak and Hui Ge (Chinese: 辉哥; Pe̍h-ōe-jī: Hui-ko), is a Singaporean actor and comedian.

This biography of a living person needs additional citations for verification. (May 2007)

Thia was a member of the main cast of Comedy Nite throughout its run,^[1] having the opportunity to work with both Jack Neo and Mark Lee. The trio also acted in movies together such as Money No Enough, That One No Enough, Money No Enough 2 and Where Got Ghost?^[1] He also made a transition to English television between 2004 and 2010 from Seasons 1 to 6, where he played the recurring role of Georgie Gan in Police & Thief alongside Mark Lee once again, where his character is the main rival of Lee's protagonist character named Lee Tok Kong.^[1]

Thia is also known to the public for his strikingly similar looks to Singaporean politician Khaw Boon Wan, a fact he often acknowledges by jokingly referring to Khaw as his twin.^[2]

In March 2023, Thia appeared in an online video that allegedly promotes a Malaysian gambling website.^[3] He was subsequently asked to assist in police investigations.^[3] His agency, King Kong Media Production, claimed that the Malaysian advertising company had filmed the advertisement not related to gambling and added on the gambling content after they approved the video.^[3]