British pop star Jessie J is on the verge of turning down a role in a "massive movie with one of the biggest American actors" because filming clashes with her upcoming stint on the Australian version of The Voice.

The Price Tag hitmaker has revealed she has been offered a part in a big-budget Hollywood film alongside one of the biggest names in the industry, but she may have to pull out because she is preparing to head Down Under for her latest reality Tv role.

She tells Britain's the Daily Star newspaper, "I've been offered a role in a massive movie with one of the biggest American actors but I don't know if I can do it. I would love to do it but it's at the same time as I'm filming the Australian Voice. So unless they move the filming to Sydney I'm going to have to turn it down."

Jessie J previously turned down a role in James Corden's film One Chance, a biopic of British singer Paul Potts, due to her hectic schedule, and she also lost out on a part in Kick-Ass 2 because she was too busy.

She adds, "I was offered a part in the Paul Potts film. I did a script reading and took the part but in the end my schedule didn't work. The part of Night B**ch in Kick Ass 2 was written especially for me. It would have been amazing but I couldn't do it because of other commitments. I've got new management now and we are trying to plan it so I don't keep missing things."