Marisa Abela had done most of the singing in this film herself. She trained extensively to mimic Amy Winehouse's vocals.
Jeff Tunke claimed he was cast as Mark Ronson and his scenes were deleted. However, director Sam Taylor-Johnson said Ronson was never a character in the film.
Scenes were filmed at Ronnie Scott's Jazz Club at 47 Frith Street, Soho, London W1D 4HT, England and outside Winehouse's first flat in Camden Town, and at Primrose Hill, London. In February, scenes were filmed inside the Metropolis Studios in Chiswick, London.
Following the death of Winehouse on July 23, 2011, several filmmakers attempted to create biopic projects but none of them progressed. By 2022, StudioCanal UK moved forward with production, and filming took place in London from January to April 2023.
In her last performance in the film, Amy Winehouse is wearing an Aston Villa Football Club pendant on her necklace. She never spoke about being a Villa fanatic herself, but her husband Blake Fielder-Civil was a Villa fanatic. In reality, she was wearing the pendant, not at a televised performance, but in paparazzi photos from a late-night visit to a late-night take-away.