Esmeralda Devlin CBE RDI (/ɛz/; born 24 September 1971) is an English artist and stage designer who works in a range of media, often mapping light and projecting film onto kinetic sculptural forms. She has received several accolades, including a Tony Award and two Olivier Awards. She was appointed Officer of the Order of the British Empire (OBE) in the 2015 New Year Honours and Commander of the Order of the British Empire (CBE) in the 2022 New Year Honours by Queen Elizabeth II for services to design. She was recognised as one of the BBC's 100 women of 2013.

Devlin is known for her extensive work in the theatre. For her work in the West End, she won two Laurence Olivier Awards for Best Set Design for Chimerica (2014) and The Nether (2015). She was Olivier-nominated for Hamlet (2016), The Lehman Trilogy (2019), and Dear England (2024). For her work on Broadway, she won the Tony Award for Best Scenic Design of a Play for The Lehman Trilogy (2022). She was Tony-nominated for Machinal (2014) and American Psycho (2016). She is also known for her roles in The Hunt (2019) and The Motive and the Cue (2023).

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