Saul Stacey Williams (born February 29, 1972) is an American rapper, singer, songwriter, musician, poet, writer, and actor. He is known for his blend of poetry and alternative hip hop and his lead roles in the 1998 independent film Slam and the 2013 jukebox musical Holler If Ya Hear Me. Description above from the Wikipedia article Saul Williams, licensed under CC-BY-SA, full list of contributors on Wikipedia.

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Saul Williams is an American actor, musician, and poet recognized for his distinctive work across independent cinema and alternative music.
He is known for his lead roles in films such as Slam and Neptune Frost, as well as supporting performances in K-PAX and Blink Twice.
He co-directed and produced the science-fiction drama Neptune Frost. Full filmography on Mood.