[5] Elliott has appeared in a number of productions at Stratford-Upon-Avon's Royal Shakespeare Theatre while studying at Warwick School.

In 2006, he joined the cast of the acclaimed Royal National Production and following tour of The History Boys.

[9] In November 2013, Elliott appeared with The History Boys at the National Theatre 50 Years on Stage production, broadcast live by BBC Worldwide.

In 2014 he appeared in Midsomer Murders: Wild Harvest and in the UK premiere of Urinetown: The Musical at St. James Theatre, as Mr. McQueen.

In June 2016, Elliott made his first appearance as doctor Isaac Mayfield in the BBC medical drama Holby City.