He won an Olivier Award for Best Leading Actor for his performance as Christopher in the National Theatre's production of The Curious Incident of the Dog in the Night-Time in 2013.

[3] Luke and Harry attended Queen Elizabeth's Community College in Crediton, where he played scrum half in the twice Devon-Cup-winning rugby union team.

[4] Inspired by a love of Eddie Vedder[4] and with support from their secondary school drama teacher, Phil Gasson,[3] Luke and his twin brother Harry Treadaway formed a band called Lizardsun with Matt Conyngham and Seth Campbell.

He made his stage debut in Saint Joan at the Royal National Theatre,[5] followed by playing Albert in the original production of War Horse at the same venue.

[3] In 2011 he played the eponymous hero of The History of Titus Groan, a cycle of six BBC Radio 4 dramas based on the books of Mervyn Peake dramatised by Brian Sibley.

[7] Starred in Horror Thriller Fortitude between 2015 and 2018 In April 2018 Luke played the part of Dr Arthur Calgary in a BBC One three-part adaptation of the Agatha Christie novel Ordeal by Innocence.