Simon Yam Tat-Wah (traditional Chinese: 任達華; simplified Chinese: 任达华; pinyin: Rèn Dáhuá born March 19, 1955) is a Hong Kong actor.
In 1989, he starred in the Japanese-Hong Kong co-production of Bloodfight. This was the first of its kind in which English was spoken throughout the entire film. In 1992, Yam gained critical acclaim for his role as the maniacal Judge in Full Contact, where he faced off in a bloody battle against Chow Yun-Fat. In 1993, he starred as "Dhalsim" in Future Cops, the Hong Kong version of Street Fighter. In 1996, Simon began his role as Chiang Tin-Sung, the leader of the Hung Hing triads in the first 3 installments of Young and Dangerous.
In 2003, Simon made his American film debut with the action packed sequel Lara Croft Tomb Raider: The Cradle of Life as a bad guy opposite Angelina Jolie.