[5] His performance as Bobby in an adaptation of Awkward Conversations With Animals I've Fucked by Rob Hayes during the 2014-15 Edinburgh Fringe received critical acclaim.
Holden recorded several episodes of the BBC Radio drama Home Front,[9] and played the part of Meus in the BBC Radio 4's broadcast premiere of Orson Welles' unproduced screenplay of Joseph Conrad's novel Heart of Darkness, starring James McAvoy.
[10] From February 2016, Holden appeared as Lysander in a national tour of Midsummer Night's Dream[11] which visited 12 venues including Belfast, Glasgow, Newcastle, Blackpool, Truro, the RSC's homes at the Barbican Centre and the Royal Shakespeare Theatre in Stratford.
Holden was in the world première of Ink by James Graham at the Almeida Theatre from June to August 2017,[13] and in 2019 he was in the Bath Theatre Royal production of My Cousin Rachel (the play by Joseph O'Connor based on the Daphne du Maurier novel) with Helen George and Simon Shepherd.
[16] In 2022, Holden appeared as Kevin Barnes in Ten Percent, the English remake of the French original, Call My Agent!.