Titus Welliver (born March 12, 1961) is an American actor and painter. He is best known for his role as Silas Adams on Deadwood, and the title role in the television series Bosch.

He played The Man in Black/Smoke Monster in 3 episodes of Lost, and Agent Felix Blake in Marvel One-Shot: Item 47, and 3 episodes of Agents of S.H.I.E.L.D..