Dame Gladys Constance Cooper (18 December 1888 – 17 November 1971) was an English actress, theatrical manager and producer, whose career spanned seven decades on stage, in films and on television.

Beginning as a teenager in Edwardian musical comedy and pantomime, she starred in dramatic roles and silent films before the First World War.

She continued full-time stage work, however, including appearances as Lady Agatha Lazenby in The Admirable Crichton in 1916 and Clara de Foenix in Trelawny of the Wells.

Aldous Huxley dismissed her performance in Home and Beauty, writing "she is too impassive, too statuesque, playing all the time as if she were Galatea, newly unpetrified and still unused to the ways of the living world.

"[4] Evidently, her acting improved during this period, as Maugham praised her for "turning herself from an indifferent actress to an extremely competent one" through her common sense and industriousness.

[6] Among other roles, Cooper was Clemency Warlock in Cynara (1930), Wanda Heriot in The Pelican (1931), Lucy Haydon in Dr Pygmalion (1932), Carola in The Firebird (1932), Jane Claydon in The Rats of Norway (1933), Mariella Linden in The Shining Hour in 1934 and 1935, in London and New York City and on tour (at the same time making her first "talkie" film, The Iron Duke), also playing Desdemona and Lady Macbeth on Broadway in 1935.

[2] Cooper turned to film full-time in 1940, finding success in Hollywood in a variety of character roles and was frequently cast as a disapproving, aristocratic society woman, although she sometimes played lively, approachable types, as she did in Rebecca (1940).

Other notable film roles were The Man Who Loved Redheads (1955), Separate Tables (1958) and The Happiest Millionaire (1967) as Aunt Mary Drexel, singing "There Are Those".

She returned to theatre (between films) more often in the 1950s and 1960s, playing in London and on tour in such roles as Edith Fenton in The Hat Trick (1950); Felicity, Countess of Marshwood, in Relative Values (1951 and 1953); Grace Smith in A Question of Fact (1953); Lady Yarmouth in The Night of the Ball (1954); Mrs. St. Maugham in The Chalk Garden (1955–56), Dame Mildred in The Bright One (1958); Mrs. Vincent in Look on Tempests (1960); Mrs. Gantry (Bobby) in The Bird of Time (1961); Mrs. Moore in a stage adaptation of A Passage to India (1962); Mrs Tabret in The Sacred Flame (1966 and 1967); Prue Salter in Let's All Go Down the Strand (1967); Emma Littlewood in Out of the Question (1968); Lydia in His, Hers and Theirs (1969); and others.

[10] Cooper starred in the 1964–65 series The Rogues with David Niven, Charles Boyer, Gig Young, Robert Coote, John Williams and Larry Hagman.

The series lasted a single season of thirty episodes, most of which featured Cooper as the matriarch of an ethical family of con artists who only prey on criminals.