After studying at the Western Australian Academy of Performing Arts, he has starred in the television period series Doctor Thorne (2016), Poldark (2017–2019), and The Gilded Age (2022–present).
Richardson was born in Sydney, Australia, before moving to London at the age of two.
He did a short course at the Royal Academy of Dramatic Art in London before enrolling at the Western Australian Academy of Performing Arts in Perth in 2012[2][1] Before graduating from WAAPA in 2014, Richardson took a course with Ivana Chubbuck at the 16th Street Acting School in Melbourne.
[3] Richardson dated fellow Poldark actor Eleanor Tomlinson for around one year, until they broke up in June 2018.
[5] In 2019, he starred in the Australian TV series Total Control as Senator Irving's Adviser Jonathan Cosgrove.