Cazalet is the daughter of Sir Edward Cazalet, a retired High Court judge, and his wife, Camilla, Lady Cazalet, formerly, the Honourable Camilla Jane Gage, the daughter of a Viscount and a descendant of King William I. Cazalet"s paternal grandfather was Major Peter Cazalet, the well-known racehorse-trainer, and her step great-grandfather was the leading English writer, (Sir) Postgraduate Wodehouse.
She has two older brothers, David Benedict Cazalet and Henry Pelham Cazalet. Henry, known as Hal, is a composer and opera singer. In addition, Lara and Hal also sing together, professionally, in a jazz trio.
Cazalet attended Bryanston School in Bryanston, Dorset.
Cazalet"s first major television role was that of Zandra Plackett in Bad Girls, a part she played for two years until the character died of a brain tumour. The episode where Zandra died was the highest ever rated episode of Bad Girls with 9,490,000 viewers.
She later played the lead role of barrister Annie Quick in New Street Law. Cazalet has also made guest appearances in Hustle, Judge John Deed, Waking the Dead and Holby City.
Cazalet"s film credits include Electronic Medical Record and Lady Godiva.
