[2] In March 2009 Emms played the lead role of Albert in the National Theatre's production of War Horse.
[12][13] More recently he has portrayed Vitas Gerulaitis in the film Borg/McEnroe directed by Janus Metz Pederson (alongside Shia LaBeouf).
[14] Emms' notable television appearances include Happy Valley by Sally Wainwright,[15] The Street by Jimmy McGovern,[16] and Scott & Bailey.
[17] In 2015, Emms played the part of Smitty, the artistic grandson of Petunia Howe, in the three-part BBC series Capital based on John Lanchester's novel of the same name.
[18] Most recently he portrays John Gerard in the BBC series Gunpowder alongside Kit Harington and Liv Tyler.