Gertrude Elliott (December 14, 1874 — December 24, 1950), later Lady Forbes-Robertson, was an American stage actress, part of an extended family of theatre professionals including her husband Johnston Forbes-Robertson and her sister Maxine Elliott.
May Gertrude Dermot was born in Rockland, Maine, the daughter of Thomas Dermot and Adelaide Hall Dermot. Her father was a sea captain born in Ireland, and her mother had been a schoolteacher. Her older sister Maxine left the household for New York City by age 16, and Gertrude soon followed. Both of them began using the surname "Elliott" as young women.
Elliott's career on stage began in 1894, with a role in Oscar Wilde's A Woman of No Importance, in a company that was touring New York state. Both Elliotts joined a company in San Francisco that toured Australia in 1896. The company was run by Nat C. Goodwin, an actor who soon married Maxine Elliott. Their company went to London in 1899, and the next year Gertrude was hired into the company of Johnston Forbes-Robertson; Gertrude Elliott and Forbes-Robertson married at the end of 1900, and continued to work together for much of their careers. She was, literally, Ophelia to his Hamlet, Desdemona to his Othello, and Cleopatra to his Caesar.
Away from the stage, Gertrude Elliott starred with her husband in a silent film version of Hamlet in 1913, directed by their friend J. H. Ryley. She also appeared in a 1917 silent film, Masks and Faces. Gertrude Elliott was a co-founder and president of the Actresses' Franchise League. During World War I she managed the "Shakespeare Hut" in Bloomsbury, a project of the YMCA for entertaining and raising morale among war workers. In 1923, New Zealand gave Gertrude Elliott an award for her work for ANZAC troops during the war.
Gertrude Elliott married English actor Johnston Forbes-Robertson in 1900. They had four daughters, including aircraft designer Maxine (Blossom) Miles and actress Jean Forbes-Robertson. Johnston was knighted in 1913, making Gertrude "Lady Forbes-Robertson" from that time. She was widowed when her husband died in 1937, and Gertrude died in 1950, aged 76 years. Her grandchildren include actress Joanna Van Gyseghem.