John Dagleish (born 1981) (/dæˈɡliːʃ/ dag-LEESH)^[1] is a British actor originally from Essex, known for his work in theatre.

In 2008 to 2011, Dagleish played Alf Arless in the Lark Rise to Candleford series on BBC.^[2] In 2014, he played Ray Davies as part of the original cast of Sunny Afternoon at Hampstead Theatre.^[3] The production transferred to the West End in October 2014, where Dagleish won the Laurence Olivier Award for Best Actor in a Musical for his performance.^[4] He was also nominated for the London Evening Standard emerging talent award.^[5] As part of the original cast he appeared on the original London cast album.^[6]

In 2015, he joined the Kenneth Branagh Theatre Company, appearing in productions of Harlequinade and The Winter's Tale at the Garrick Theatre.^[7] In 2016, he played Lysander in A Midsummer Night's Dream at the Young Vic.^[8] In May 2017, he appeared in Common at the Royal National Theatre.^[9] Later that year, he appeared in Justice League.^[10]

In 2018 in the film Christopher Robin, he plays the role of Matthew Leadbetter.^[11]