Ileana Leonidoff (3 March 1893 – 1 January 1968) is a pseudonym for Elena Sergeevna Pisarevskaya (Russian: Елена Сергеевна Писаревская), a Russian-born emigrée who first made a career in Italy in silent films and then as a noted dancer and choreographer.

Elena Sergeevna Pisarevskaya was born in 1893 in Sevastopol, a town on the Black Sea on the Crimean Peninsula during the Russian Imperial Period to Cleopatra Gavrilovna (née Sudkovskaya) and rear admiral Sergei Petrovic Pisarevsky.

After their father's death in 1908, Cleopatra brought her daughters to Milan around 1911, where Pisarevskaya's first performances were for charitable events and concerts held by the Accademia Filarmonica Romana in 1916.

[1] In 1917, Pisarevskaya, now using the stage name of Ileana Leonidoff, was chosen by Anton Giulio Bragaglia to appear in his silent film Thaïs.

For her film debut, Leonidoff portrayed the Countess Bianca Stagno-Belincioni, who is involved in a love triangle between Thaïs and the Count of San Remo.

At a time when the fascist definition of gender roles dictated that women should be in the home and not the workplace, Leonidoff's embrace by the government was unusual.

Leonidoff soon married the French director André Gardes, and began collaborating with other artists on new choreographies, such as Alexey Tsereteli and his Russian Opera in Paris performances in Barcelona of Boris Godunov, Sadko, and The Tale of Tsar Saltan, Amilcare Ponchielli for choreography on La Gioconda and Alfredo Catalani for the dance arrangements in Loreley, among others.

Two of her last Italian choreographic works were for Mahit by Riccardo Pick-Mangiagalli in 1938 and for The Three-Cornered Hat by Manuel de Falla performed at the Teatro Carlo Felice in Genoa in 1939.

[7] By 1952, she debuted with the National Symphony Orchestra, producing El hada de las muñecas (The Fairy Doll) by Josef Bayer[12][7] and in 1953 was honored as a knight of the Order of the Condor of the Andes by president Víctor Paz Estenssoro.

Making the organization a professional one, she trained dancers such as Noralma Vera Arrata, Piero Jaramillo, and Vilma Pombar, among others, before leaving Ecuador in 1961.