- Changed his name from Terrence to Finn to avoid confusion with the Monty Python actor.
- Made his TV debut in a spinoff of the UK soap opera Hollyoaks, called Hollyoaks Later.
- Originally auditioned for the role of Jon Snow on Game of Thrones, but was cast as Loras Tyrell instead.
- Assisted with a 2015 Oxfam fundraiser to support Syrian refugees by singing Christmas carols.
- A vocal supporter of social causes, including gay rights, and racial and gender equality.