The event featured behind-the-scenes footage and rehearsals, emphasizing the show's enduring legacy and collaborative spirit, with media available to the public.

Les Misérables originally opened at the Barbican Center in London in 1985, and its 40th anniversary was marked on October 8, 2025, celebrating four decades of its cultural impact.

The celebration was attended by prominent guest artists such as Patti LuPone, Michael Ball, Alfie Boe, Samantha Barks, Matt Lucas, Frances Ruffelle, Carrie Hope Fletcher, Gerónimo Rauch, Jeremy Secomb, and Bonnie Langford.

To celebrate the 40th anniversary of Les Misérables, a special charity gala was held in London's West End, featuring performances by nearly 100 past and present cast members.

The anniversary celebration included a gala performance that showcased iconic songs like 'Stars,' 'I Dreamed a Dream,' 'Bring Him Home,' and 'One Day More,' performed by notable cast members and guest artists.

This production has traveled through several venues over the years, including the Palace Theatre, Queen's Theatre (later renamed the Sondheim Theatre), and Gielgud Theatre, maintaining a continuous run despite changes in staging and location.

All proceeds from the gala were donated to UK charities The Felix Project and UKHarvest, organizations dedicated to rescuing and redistributing healthy food to those in need, aligning with themes of compassion and social justice.

Key contributors to the original production, including Cameron Mackintosh, Alain Boubil, Claude-Michel Schönberg, Trevor Nunn, John Caird, Laurence Connor, and James Powell, shared insights about its development and opening.