Olivia Hallinan is a British actress best known for her role as Laura Timmins in the BBC TV series Lark Rise to Candleford and also as Kim in the Channel 4 drama Sugar Rush. She also starred as Ellie in Girls in Love.

Hallinan is from Twickenham, West London, and is the second youngest of four sisters. Olivia Hallinan began training at her mother's Saturday drama school All Expressions in Teddington when she was 11, and then went on to professional acting. After attending St Catherine's School in Twickenham, and Notting Hill & Ealing High School, in Ealing, Hallinan went on to study English and Drama at the University of Manchester.