Sullivan Walker is a Trinidadian actor who has played numerous small and recurring roles on television shows since the early eighties, including The Cosby Show from 1988 to 1991. He has guest stared in single episodes of The Pretender (1999), The Sentinel (1997), and Law & Order: Special Victims Unit (2004). He also played a bit part in several movies, including Crocodile Dundee (1986).

His most significant role was in the 1994-1995 show Earth 2, where he appeared in nearly every episode as Yale, a cybernetic advisor to Devon Adair (Debrah Farentino) and tutor to her son, Uly.

His most recent role was in the 2005 movie Get Rich or Die Tryin'.