Left home at age 18 to make his fortune as a tea planter in Ceylon (now Sri Lanka) but didn't succeed, and returned to England several years later.
Made British stage debut (as a murderer) in a 1902 Sherlock Holmes mystery.
Moved to New York several years later and performed steadily in the theater for more than three decades, beginning in 1905.
Made film debut in 1941's The Maltese Falcon—the first of nine collaborations with fellow character actor Peter Lorre (and five with Humphrey Bogart). Falcon also earned Greenstreet his only Oscar nomination.
Provided the voice of detective Nero Wolfe for two years on radio after retiring from films in 1949.
1941, Oscar — Best Performance by an Actor in a Supporting Role: Nominee