Shields', while at a theatrical workshop, was spotted by an acting agent. Her earlier works include working in theater for over a year. She also worked in various other leads in independent and feature films like Mission Improbable (2007) and Live Bait (1997).
She made her Bollywood debut in 2010, in the action thriller, Prince. The same year, she appeared in the epic adventure Ao The Last Neanderthal, a love story set 30,000 years ago in a lost savage world. The film was produced by European cinema chain UGC.
Aruna is also a dance choreographer and has experience as a belly dancer.
According to Google zeitgeist, in the year 2010, Aruna was the number one most sought-after actress in internet queries originating from India.
Shields' has a wellbeing channel on YouTube called Aruna Shields TV, which began in 2015. 
She studied Hypnosis and Psychotherapy at Masters level at the National Colleges in London and also trained in Mindfulness.  Her earlier education includes a distinction from the Guildhall School of Music and Drama, a degree from Central Saint Martins, and an academic scholarship to Durham Boarding School.