As Ben in Dis/Connected in 2007. Fresh out of drama school. :) Credit to creator (found on Google).
Vanity Fair Italia (October 2018): The first time he acted was in Dis/connected ("I was 21 and no idea of what I was doing") but the popularity arrived with Merlin "That was a huge opportunity for me, the audience get use to see you in that role in the same time you want to try something new".