Sean Lau Ching-wan (born 16 February 1964) is a Hong Kong actor who has acted in both films and television series.

Most recently, Lau is known for his role in Detective vs Sleuths (2022), for which he won the Hong Kong Film Award for Best Actor.

He joined the TVB acting classes in 1983 and made his first appearance on television in the following year in the drama Draw Out the Rainbow.

His wife, Amy Kwok, who won the Miss Hong Kong Pageant in 1991, is also a well-known former television actress and co-starred with him on The Greed of Man.

His critically acclaimed roles include acting opposite Anita Yuen as a down-and-out musician in C'est la vie, mon chéri (1993) and in a number of cop thrillers such as Big Bullet (1996), Full Alert (1997), The Longest Nite (1998), Running out of Time (1999), Running Out of Time 2 (2001) and Mad Detective (2007).