Josephine Stephenson (b. 1990) is a Franco-British musician living in London.

"Music to arrest the ears and stop the heart" (The Times)               

Josephine has written for ensembles and soloists including The Hermes Experiment, Explore Ensemble, the Britten-Pears Contemporary Ensemble, Outcry Ensemble, the Van Kuijk Quartet, Ensemble Miroirs Étendus, The Erebus Ensemble, the Maîtrise de Radio France, gambist Liam Byrne, violist Stephen Upshaw, and violinists Eloisa-Fleur Thom and Fiona Monbet. Her music has been commissioned by the BBC, Radio France, Spitalfields Music, Nonclassical, Bristol Proms, Dulwich Picture Gallery, National Portrait Gallery, Miroirs Étendus and Listenpony. It has been broadcast on France Musique, BBC Radio 3 and 6 Music, Resonance FM, and appeared on television channels BBC Two and Four.

She has collaborated with theatre companies L'Éventuel Hérisson Bleu (for the opera Les Constellations - une théorie, produced by Miroirs Étendus and Lille Opera) and FellSwoop Theatre (Ghost Opera, supported by the Festival d'Art Lyrique d'Aix-en-Provence, Aldeburgh Festival and LOD festival). She regularly makes music for films (including Julia Hart's Emma, Change the Locks, winner of 'Best Composer' at Underwire Festival 2015) and has worked as assistant for composers Dario Marianelli and Benjamin Wallfisch. 

Josephine also enjoys working with songwriters and bands (Daughter, Evergreen, Night Works, NZCA LINES, Shock Machine, James Canty) and wrote several arrangements for the David Bowie Prom at the Royal Albert Hall in 2016, collaborating with s t a r g a z e and artists such as Paul Buchanan (The Blue Nile) and Conor O'Brien (Villagers). 

She is one of the 3 artistic directors of Listenpony, a London-based concert production company and record label which puts on regular events mixing contemporary classical music with traditional classical music and popular styles, and puts these performances out as digital EPs. 

Josephine is a graduate of Clare College, Cambridge, where she read Music and studied composition with Giles Swayne, and the Royal College of Music, where she was a Richard Carne scholar and completed her Masters in Composition under Kenneth Hesketh. She has participated in masterclasses led by composers such as Samuel Adler, Mark-Anthony Turnage, Colin Matthews, Oliver Knussen and Ivan Fedele. She was a Britten-Pears Young Artist 2015/16 and is a Writing the Future composer with the London Sinfonietta for 2018/2019.