Trieve was born in 1995 and grew up in Eastcote, Greater London.He attended Bishop Ramsey CofE School where he successfully completed his A Levels in Drama, Art, and English Literature in 2013. That same year, he successfully gained a place on a three-year BA (Hons) degree course in Professional Acting at the world-renowned London Academy of Music and Dramatic Art (LAMDA), which is notable for its numerous high-calibre and successful alumni.Trieve graduated from LAMDA in July, 2016.