Boon Koh was born in Canterbury, England and grew up in Singapore. He attended Anglo Chinese School and did his acting training in the UK, graduating with a licentiate from LAMDA (London Academy of Music and Dramatic Art). He appeared in a number of theater productions in Singapore with Theatreworks before landing a role in 12 Storeys (dir. Eric Khoo) which was the first Singaporean film to be screened at Cannes. Subsequently he has appeared in several films and stage productions, the most recent of which is Apprentice (Boo Junfeng). He resides in Los Angeles.