In Christmas 2013 Lee began a television starring role as DCI Barnaby's new sergeant, DS Charlie Nelson, in the 16th series of Midsomer Murders, which will also include the show's 100th episode, partially shot in Denmark in collaboration with the local national broadcasting corporation, DR.
In early 2014 he will appear in Versailles at the Donmar Warehouse.
Lee was born in Bristol to Welsh parents, Tom and Ceinwen. He has three older siblings: Geraint, Owen and Rhiannon. When he was young the family moved to Sutton Coldfield in Birmingham.
He studied English literature at Cardiff University and drama at The Guildhall School of Music and Drama, where he received the Guildhall Gold Medal in 2008.
Lee now lives in London. He passionately supports Wales in rugby.