The 28-year-old singer plays Azizah, a muse for the late film legend Tan Sri PRamlee, in the musical about his life which will be out next month.

The show’s executive producer, Datin Seri Tiara Jacquelina, told Malaysian daily Utusan Malaysia: ‘I’m impressed with the spirit and dedication that the cast has shown, especially the country’s No1 singer, Siti Nurhaliza.

‘I never imagined she would give such a good performance. It’s clear that our casting of her was not a mistake.’

Datin Tiara said she was especially moved by the singer’s rendition of the song, Mulanya Cinta (Love Begins), which was penned by Singapore composer Dick Lee.

‘It stunned me and I almost couldn’t believe that Siti could do it,’ she said.

Tiara also praised singer Liza Hanim who plays the late Saloma, P Ramlee’s third wife, for ‘almost recreating’ the real Saloma.

Playing the title character is actor Sean Ghazi.

Siti Nurhaliza won praise playing P Ramlee’s muse.

Datin Tiara is no stranger to musicals, having helmed last year’s successful Puteri Gunung Ledang: The Musical.

She added that this musical will be far grander in scale with 12 main sets, compared to just four for Gunung Ledang.

The musical traces P Ramlee’s later life, from his 50s till his 70s, and has a cast of over 40.

Datin Tiara added that there are also plans to stage the musical in Singapore’s Esplanade Theatre, as well as a second run of Puteri Gunung Ledang.