
Prasanna Puwanarajah (Tamil: பிரசன்னா புவனராஜா; born 1981) is a British actor, director, writer, and former junior medical doctor.
Puwanarajah was born at Ipswich Hospital in Suffolk to Tamil Sri Lankan parents from Sri Lanka, his mother a psychiatrist and his father a dentist. He spent his early childhood on Churchill Avenue in Ipswich before the family moved to Hampshire when he was four. He participated in school plays and spent a season with the National Youth Theatre, but thought of acting as more of a hobby than a career choice at the time.
He trained in Medicine at New College, Oxford. After working as a junior doctor in reconstructive surgery for over three years, Puwanarajah decided to take a year out. It was during this time he decided to become a full-time actor, describing it as "more of a strong pull towards something else" than a "push away from" his medical career.

Too Much
(10 episodes)
2025

The Listeners
Paul · (4 episodes)
2024

Payback
DC Jibran Khan · (6 episodes)
2023

Malcolm
Joe
2023

Ten Percent
Dan Bala · (8 episodes)
2022

National Theatre Live: Dara
Prosecutor Talib
2020

Defending the Guilty
Ashley · (6 episodes)
2018

Patrick Melrose
Johnny · (4 episodes)
2018

The Crown
Martin Bashir · (2 episodes)
2016

You, Me and the Apocalypse
Rajesh · (5 episodes)
2015

The Vote
Tom Baird
2015

Critical
Ramakrishna Chandramohan · (13 episodes)
2015

The Gunman
Doctor (UCL)
2015

Diana
Martin Bashir
2013

Möbius
Saïd
2013

National Theatre Live: Hamlet
Guildenstern
2010

National Theatre Live: London Assurance
Servant
2010

The Stoning of Soraya M.
Revolutionary Guard
2009

The Sarah Jane Adventures
Car Salesman · (1 episode)
2007