Changed last name of Williams to mother's maiden name Perrineau after joining the Screen Actors Guild, which already had a member named Harold Williams
Started his acting career in theater
Landed first television role on the series I'll Fly Away in 1990
Won an NAACP Image Award for his role in Topdog/Underdog in 2001
Nominated for Best Supporting Male for the Independent Spirit Award for his part in Smoke (1995)
Skilled in martial arts
Started taking swimming lessons on the location of Lost
Awards
2005Screen Actors Guild Awards-Outstanding Performance by an Ensemble in a Drama Series:winner