Teresa Mariani (24 October 1868^[1] – 1 August 1914) was an Italian actress.

Mariani was born into a family of performers in Florence. She began her acting career as a small child, in a Paris production of Ernest Legouvé's Medea, sharing the stage with Adelaide Ristori.^[2][3]

Mariani was a comic and dramatic actress who performed in throughout Europe and toured in the Caribbean and South America.^[4][5][6] She worked in various theatre companies, including those run by Ermete Novelli and Cesare Rossi.^[7] She was head actress with her own touring company from 1894 to 1908,^[8] with the other members including her husband Vittorio Zampieri [ca], Achille Majeroni, Maria Melato, Ernesto Sabbatini, and Arturo Falconi. In 1898, she was the first actress to play Ibsen's Nora in Uruguay, when she starred in her company's production of A Doll's House in Montevideo.^[9] She sat for a portrait by Spanish painter Ramon Casas, who also used her image to illustrate the share certificates for Hispano Suiza Fabrica de Automoviles SA.

Mariani also appeared in a silent film, Situazione comica (1909). A few months before her death in 1914, she performed in Greek classical dramas in Verona, with Gualtiero Tumiati.^[10]

Mariani married actor Vittorio Zampieri.^[2] She died from heart failure in 1914, aged 45 years, at Castelfranco Veneto.