River Massey is an Irish / Australian actor, playwright and theatremaker based in Dublin and London.

River is a 2026 graduate of The Gaiety School of Acting, and trained at NIDA (National Academy of Dramatic Arts) in Melbourne, Australia. 

Currently, River is performing as CASSIO in an Irish tour of OTHELLO, directed by Will Wollen. 

Most recently, he played MARIO LINX in TESCO NINJAS by Darren Murphy, directed by Éadaoin Fox at Smock Alley The­atre and starred in Bread & Circus’ short film LOVES. 

River was selected for FISHAMBLE’S TENDERWRITE programme, which will culminate in his new writing being shared at Dublin Fringe Festival 2027.