Baronova was born in Saint Petersburg (then known as Petrograd) in 1919, the daughter of a lieutenant in the Imperial Navy, Mikhail Baronov, and his wife Lidia (née Vishniakova). In November 1920, the Baronov family escaped the Russian Revolution by dressing as peasants and crossing the border into Romania. After first arriving in Curtea de Argeș, Romania, the family eventually settled in Bucharest. Irina's father found work at a factory and, for the next several years, the Baronov family lived in the slums surrounding the various factories where Mikhail was employed.
Irina's mother, who loved the ballet and had often attended the theatre in Saint Petersburg, found a ballet teacher in Bucharest for Irina. In 1927, at the age of seven, Irina began taking her first ballet lessons from a former corps de ballet member of the Mariinsky Theatre Ballet.
When Baronova was 10 years old, the family moved to Paris to provide her with professional training. She was taught by Olga Preobrajenska. She also studied with fellow ballerina Mathilde Kschessinska. Baronova made her debut aged 11 at the Paris Opera in 1930.
Baronova's first principal role was Odette in Swan Lake, partnered by Anton Dolin, which she performed at 14 years old.
At age 17, she eloped with a Jerry Sevastianov. Two years later, they married in Sydney, Australia, where she was on tour. She then joined the Ballet Theatre in the USA, under the patronage of Sol Hurok. She and Sevastianov divorced. While in Britain in 1946, she met the agent Cecil Tennant, who asked her to marry him if she would give up ballet; he agreed and retired.
Baronova and Tennant had three children, including Victoria. Through Victoria, she became the mother-in-law of Steve Martin. In 2014, Victoria published a pictorial biography of her mother's life entitled Irina Baronova and the Ballets Russes de Monte Carlo.[3]
In 1967, Cecil Tennant was killed in a car accident, and Baronova moved to Switzerland. Later, she resumed her relationship with her first husband, Jerry Sevastianov, who died in 1974. She returned to teaching classes in the United Kingdom and United States in 1976.[4]Margot Fonteyn asked her to conduct a training course for teachers. In 1986, she staged Fokine's Les Sylphides for The Australian Ballet. In 1992, she returned to Russia to help the Mariinsky Theatre with an archival project. In 1996, she received a Vaslav Nijinsky Medal from Poland and an honorary doctorate from the North Carolina School of the Arts.
Only five weeks before her death, she spoke at a symposium in Adelaide, South Australia, on the Ballets Russes' tours of Australia. She died in her sleep at Byron Bay on 28 June 2008.[8]