Yuen Siu-Tien (27 November 1912 – 8 January 1979) (also known as Yuan Xiaotian, Simon Yuen, Sam Seed or "Ol' Dirty") was a Chinese martial arts film actor in the late 1970s. Yuen is perhaps best known as Beggar So in three films: Drunken Master, Story of Drunken Master and his final film Dance of the Drunk Mantis. He starred in films with film actors like Jackie Chan and under the direction of his real life son Yuen Woo-ping. Yuen died having a heart attack in 1979.

Leader of the Yuen Clan and father of: Peace Yuen Wo-Ping; Charlie Yuen Cheung-Yan; Sunny Yuen Shun-Yi; Simon Yuen Yat-Choh; Brandy Yuen Jan-Yeung and Yuen Lung-Kui.