Fisher completed her education at Swanbourne Primary School and Methodist Ladies' College. She also played the lead role in school productions like Little Shop of Horrors. When she was 21 years old, she studied clown, mime and commedia dell'arte from L'École Internationale de Théâtre Jacques Lecoq, in Paris.
Fisher made her acting debut in children's television shows, Bay City and Paradise Beach. After some years, she appeared in television miniseries produced by ITV called Oliver Twist. This series was directed by Renny Rye and Written by Alan Bleasdale. The co-stars of this series are Robert Lindsay, Keira Knightley, Michael Kitchen, and Sam Smith.
After a couple of years, Fisher appeared in German slasher film, Swimming Pool, which was directed by Boris von Sychowski. The co-stars of this movie are Kristen Miller, Cordelia Bugeja, and John Hopkins. Later, she featured in an American neo-noir psychological thriller movie, Nocturnal Animals, along with Amy Adams, Jake Gyllenhaal, and Michael Shannon. The total budget for this movie was $22.5 million and grossed $30.9 million at the box office.
Similarly, Fisher has appeared in numerous movies and television series including Home and Away, BeastMaster, Neighbors from Hell, Arrested Development, Sofia the First, The Wannabes, I Heart Huckabees, Wedding Crashers, Wedding Daze, Rise of the Guardians, The Great Gatsby, Keeping Up with the Joneses, Tag, and The Beach Bum.
Fisher is an Australian by nationality and belongs to white ethnicity. She began dating Sacha Baron Cohen, after she met him at a party in Sydney, Australia. After dating him for sometimes, she got engaged to him. After six years of their engagement, the couple got married in a Jewish ceremony in Paris, France.
The couple is blessed with three children; among them, two are daughters namely Olive and Elula and a son, Montgomery. She lives a happily married life with her husband and children and there are no rumors of divorce with her spouse. Once Sacha Baron Cohen's wife Isla Fisher shared a dirty story about her husband while promoting her book.
Most of Fisher's the income comes from her acting and endorsement career. She has appeared in numerous movies and television series from which she must have collected a decent amount of salary. According to some source, her current net worth is estimated to be $16 million. She has a luxury car Q7 which is manufactured by Audi and costs around $80000.