O is a water-themed stage production by Cirque du Soleil, a Canadian circus and entertainment company.

The show has been in permanent residence at the Bellagio in Las Vegas, Nevada, United States, since October 1998.

[2][3] O was inspired by the "infinity and elegance of water's pure form," which pays tribute to the beauty of the theatre.

A group of 150 stage technicians assists in the production of the show, the cast of which is 85 performers: international acrobats, synchronized swimmers, and divers.

A mesh false ceiling allows warm moist air to escape out of the top of the theatre.

[17] Costumes for O drew inspiration from many sources: commedia dell'arte, the Baroque, India, the Arabian Nights, as well as Venetian courtly fashions.

The Flayed Ones' leotards, for example, originally had hand-painted muscles on them, as digital screen-printing was inaccessible at the time of creation.

[19] Additional facts regarding the costumes:[19] The music of O was composed by Benoit Jutras and features a mix of classical Western and world instrumentation, including Chinese violin (erhu), bagpipes, African guitar and harp (kora), Colombian guitar, cello, ancient woodwinds and a wide variety of percussion instruments.

[21] During the show, the score is performed by a live band situated behind glass walls above and to the side of the stage.

The film shares the behind the scenes story of the professional and personal lives of the cast and crew returning to the COVID-19 pandemic closed show.