Kirsten trained at the Bristol Old Vic Theatre School.

Recent theatre credits include: Eureka Day (Old Vic Theatre); Life of Pi (Wyndham’s Theatre West End); Much Ado About Nothing (New English Shakespeare Company); Around the World in 80 Days (Kenny Wax Family Entertainment); Othello Macbeth (Lyric Hammersmith/HOME Manchester); Romeo and Juliet, and The Adventures of Sherlock Holmes (Aquila Theatre US Tour).

Recent television credits include: Rain Dogs (BBC/HBO), Nightingale (ITV), Grantchester (ITV), Doctors (BBC), Vera (ITV), The Sandman (Netflix), A Discovery of Witches (Sky), Jekyll and Hyde (ITV) and Critical (Sky One).