Harold Perrineau (formerly Harold Williams; born August 7, 1963) is an American actor. He is best known for the roles of Michael Dawson in the U.S. television series Lost, Link in The Matrix films and games, Augustus Hill in the American television series Oz, Damon Pope in the FX bike gang drama Sons of Anarchy, and Mercutio in Baz Luhrmann's Romeo + Juliet. He starred in ABC's comedy-drama television series The Unusuals, playing NYPD homicide detective Leo Banks and has appeared in several high-profile films, including The Best Man, 28 Weeks Later, 30 Days of Night: Dark Days, and Zero Dark Thirty. He also starred with Anthony Hopkins and Alec Baldwin in the survival drama The Edge. Perrineau currently costars as Dean Simms in the TNT series Claws.
He is also known as Harold Perrineau Jr..