Sandhu was born and brought up in Caerleon, Wales[4] to first-generation British Sikh parents.

She began acting at the age of 11[5] and moved to London at 18 to start her degree in English literature at King's College.

[3] Sandhu first appeared in an ad for Wrigley's Doublemint and one for Vodafone India[when?].

This was followed by the American TV series Pandora,[7] and the Tamil-language film Adithya Varma, both in 2019.

[8] She later signed on to the Hindi-language film Sardar Udham[9] and the British production Kavita and Teresa.