[1][2] He also played Wee John Feeney on the HBO Max series Our Flag Means Death (2022–2023).

[9][10] In October 2018, Nairn appeared in a commercial for eToro that was launched on YouTube, featuring the Internet meme HODL.

He got the opportunity to play backstage with Megadeth during the Hellfest Open Air Festival in Clisson, France, in June 2018.

[14][15] In March 2014, Nairn publicly discussed his gay identity in an interview with a Game of Thrones fan site.

"[19] In April 2023, Nairn revealed to the BBC that he had witnessed the shooting of policeman Darren Bradshaw at the Parliament Bar in Belfast in May 1997.