|Born||30 June 1981|
John Heffernan (born 30 June 1981 in Billericay, England) is a British actor. He has worked with the English Touring Theatre, the Royal Shakespeare Company, and the National Theatre, taking the lead roles in Edward II at the National Theatre, and Oppenheimer with the RSC. He has appeared on screen in a number of roles, including Henry Lascelles in the BBC adaptation of Susanna Clarke's novel Jonathan Strange & Mr Norrell, Jaggers in Dickensian and Steven Rose in the fourth series of Luther. In 2017, he played John Grigg, 2nd Baron Altrincham, in an episode of the Netflix series The Crown. He also played the Nine for Big Finish, in their Doctor Who box sets Doom Coalition and Ravenous.
|2013||Having You||Dr. Matthew Jenson|
|2015||Eye in the Sky||Major Howard Webb|
|2017||Crooked House||Laurence Brown|
|2019||Official Secrets||James Welch|
|2020||Misbehaviour||Gareth Stedman Jones|
|2008||King Lear||Oswald||Television film|
|2012||The Hollow Crown||Francis||2 episodes|
|2013||Murder on the Home Front||Wilfred Zeigler||Episode: "Part 1"|
|2013||Love and Marriage||Ashley Roehampton||6 episodes|
|2014||Outlander||Brigadier General Lord Thomas||1 episode|
|2014||Ripper Street||Ronald Capshaw||2 episodes|
|2015||Sons of Liberty||Governor's Aide||3 episodes|
|2015||Foyle's War||James Griffin||Episode: "Trespass"|
|2015||Jonathan Strange & Mr. Norrell||Henry Lascelles||7 episodes|
|2015||Luther||Steven Rose||2 episodes|
|2017||The Loch||Dr. Simon Marr||6 episodes|
|2017||The Crown||Lord Altrincham||Episode: "Marionettes"|
|2018||Collateral||Sam Spence||4 episodes|
|2019||Brexit: The Uncivil War||Matthew Elliott||Television film|
|2020||Dracula||Jonathan Harker||Television mini-series|
|2007||Manhunt 2||The Watchdogs gang member|
|2015||Final Fantasy XIV: Heavensward||Nero|
- "Introducing... John Heffernan". Officiallondontheatre.co.uk. 2013-05-15. Retrieved 2015-06-18.
- Lawless, Jill (2015-01-28). "Art embraces science in new British play 'Oppenheimer'". Timesofisrael.com. Retrieved 2015-06-18.
- Ben Arnold. "Jonathan Strange & Mr Norrell recap: episode five – Arabella | Television & radio". Theguardian.com. Retrieved 2015-06-18.
- Power, Ed (9 December 2017). "The Crown, season 2, episode 5 review: the 'priggish' Queen comes under media attack". The Telegraph. Retrieved 9 December 2017.
- "3. Ravenous 3 - Doctor Who - Ravenous - Big Finish". www.bigfinish.com.