William Henry Redfield (January 26, 1927 – August 17, 1976) was an American actor and author who appeared in many theatrical, film, radio, and television roles.

A founding member of New York's Actors Studio,[2] Redfield's additional theatre credits include A Man for All Seasons, Hamlet, You Know I Can't Hear You When the Water's Running, and Dude.

Other Broadway credits include Excursion (1937), Virginia (1937), Stop-over (1938), Junior Miss, Snafu, U.S.A., Barefoot Boy With Cheek (1947), Montserrat (1949), Misalliance (1953), Double in Hearts (1956), Midgie Purvis (1961), A Minor Adjustment (1967) and The Love Suicide at Schofield Barracks (1972).

On television, Redfield played the title role in the DuMont series Jimmy Hughes, Rookie Cop (1953), and appeared in The Philco Television Playhouse, Lux Video Theatre, The United States Steel Hour, Studio One, As the World Turns, Alfred Hitchcock Presents, Gunsmoke, Naked City, Maude, Rich Man, Poor Man Book II, Bewitched , and The Bob Newhart Show.

This classic book of the theater was out of print for several decades, until a new edition was published in March 2024 in response to a production of "The Motive and The Cue", a play by Jack Thorne.