John Macmillan is known for House of the Dragon (2022), The Nevers (2021) and King Lear (2018).
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| 2024 | Up the Catalogue as Daniel Fortescue |
| 2024 | Seize Them! as King Guthrum |
| 2023 | National Theatre Live: Phaedra as Eric |
| 2022 | Düğünde Nefret Ettiğimiz İnsanlar as Ollie |
| 2022 | Bus Girl as Mr. Relaxation (voice) |
| 2021 | Robot Ron Bir Sorun Var as Bubble Techs (voice) |
| 2021 | The Dig as Dr Rothman |
| 2020 | Tumbleweed as Cooper Cat (voice) |
| 2020 | Boys On Film 20: Heaven Can Wait as Ben (segment "Mine") |
| 2019 | Dial M for Middlesbrough as Chad |
| 2018 | Kral Lear as Edmund |
| 2017 | Mine as Ben |
| 2017 | National Theatre Live: Yerma as Victor |
| 2017 | Simon Amstell : Katliam as Troye King Jones |
| 2014 | Fury as Corporal |
| 2014 | Malefiz as Captain |
| 2012 | Stars In Shorts as Jason |
| 2012 | Kara Şövalye Yükseliyor as Analyst #2 |
| 2011 | Friend Request Pending as Jason |
| 2011 | Hanna as Lewis |
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